| Simulation of Compressible Multi-Phase Turbulent Reacting Flows |
01-Sep-2008 |
53 pages |
| Authors:
Suresh Menon; Franklin Genin; GEORGIA INST OF TECH ATLANTA SCHOOL OF AEROSPACE ENGINEERING
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 | Simulation of multi-phase, turbulent reacting flow is in itself a very complex task but when such flows occur in the presence of strong, unsteady shocks additional complexity can arise. Shock interactions with shear turbulence can change turbulent structures and shock induced heating can trigger ignition, combustion and turbulent flame propagation. In this research, a new and an efficient large-eddy simulation (LES) strategy has been developed to investigate turbulent flows in ... |
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| Mass Remaining During Evaporation of Sessile Drop |
01-Sep-2008 |
35 pages |
| Authors:
James E Danberg; SCIENCE APPLICATIONS INTERNATIONAL CORP (SAIC) ABINGDON MD
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| A theory to predict the evaporation rate of HD (mustard agent) for the special case of a glass substrate has been developed. This is an important reference case for the wind tunnel and field test measurements of the HD evaporation rate. The HD drop is treated as a spherical segment with a constant base diameter characterized by the variation of the droplet shape factor (height to base diameter) or contact ... |
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| Wave Climate and Littoral Sediment Transport Study for Virginia Beach, VA - Rudee Inlet to Cape Henry, Hydraulic Model Study |
01-Sep-2008 |
145 pages |
| Authors:
Michael J Briggs; Edward F Thompson; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
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| The Norfolk District is preparing an Environmental Assessment for the use of sand sources off the coast of Cape Henry for future maintenance of the Virginia Beach, VA, shoreline. The primary purpose is to maintain a buffer for hurricane protection for structures landward of the existing beach. The Cape Henry Borrow Area is being considered as a sand source. The plan borrow scenario involves removing approximately 34.2 M cu yd ... |
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| A High-Order, Adaptive, Discontinuous Galerkin Finite Element Method for the Reynolds-Averaged Navier-Stokes Equations |
01-Sep-2008 |
184 pages |
| Authors:
Todd A Oliver; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF AERONAUTICS AND ASTRONAUTICS
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| This thesis presents high-order, discontinuous Galerkin (DG) discretizations of the Reynolds-Averaged Navier-Stokes (RANS) equations and an output-based error estimation and mesh adaptation algorithm for these discretizations. In particular, DG discretizations of the RANS equations with the Spalart-Allmaras (SA) turbulence model are examined. The dual consistency of multiple DG discretizations of the RANS-SA system is analyzed. The approach of simply weighting gradient dependent source terms by a test function and integrating ... |
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| Navier-Stokes Predictions of Dynamic Stability Derivatives: Evaluation of Steady-State Methods |
Sep-2008 |
44 pages |
| Authors:
Paul Weinacht; James DeSpirito; Sidra I Silton; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
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| The prediction of the dynamic stability derivatives-roll-damping, Magnus, and pitch-damping moments-were evaluated for three spin-stabilized projectiles using steady-state computational fluid dynamic (CFD) calculations. Roll-damping CFD predictions were found to be very good across the Mach number range investigated. Magnus moment predictions were very good in the supersonic flight regime; however, the accuracy varied in the subsonic and transonic flight regime. The best Magnus moment prediction in the subsonic flight regime ... |
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| Factors of Safety for Richardson Extrapolation for Industrial Applications |
Sep-2008 |
18 pages |
| Authors:
Fred Stern; Tao Xing; IOWA UNIV IOWA CITY IIHR - HYDROSCIENCE AND ENGINEERING
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| Improved factors of safety for quantitative estimates for grid and time convergence uncertainties for CFD solutions are proposed for situations when Richardson extrapolation estimated order of accuracy P(sub k) is larger than the theoretical order of accuracy P(sub k(th)) and correction factor 1C(sub k)2. The improved uncertainty estimates are shown to provide more reasonable intervals of uncertainty for P(sub k) P(sub k(th)) (1C(sub k)2). |
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| Hydrodynamic Responses of Modular Hybrid Piers (MHP) to Passing Ships |
Sep-2008 |
72 pages |
| Authors:
Erick T Huang; Hamn-Ching Chen; NAVAL FACILITIES ENGINEERING SERVICE CENTER PORT HUENEME CA
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| This study explores the passing ship effects on a floating pier in typical navy waterfront environments. The goal is to observe the pier performance in the passing ship episode, identify disturbances due to the buoyancy hull of the pier to the ambient water and client ships, and assure the design capacity of the founding system for the pier. The study addresses relevant hydrodynamics with a proven simulation model replicating the ... |
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| Dynamic Multiscale Simulation of Polyelectrolyte Nanoassemblies |
21-Aug-2008 |
11 pages |
| Authors:
Satish Kumar; MINNESOTA UNIV MINNEAPOLIS
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| The goal of this project is to develop a fundamental understanding of how fluid flows, electric fields, and surface patterning affect polyelectrolyte adsorption, self-assembly, and transport near solid surfaces. Polyelectrolytes are charged polymers whose behavior is central to Army-relevant technologies (e.g., biochemical sensors, surface functionalization) but poorly understood. Brownian dynamics simulations---a coarse-grained simulation method suitable for describing non-equilibrium polymer behavior---have been applied to study polyelectrolyte adsorption in shear flow, polyelectrolyte ... |
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| Comparison of Engineering Correlations for Predicting Heat Transfer in Zero-pressure-gradient Compressible Boundary Layers with CFD and Experimental Data |
Aug-2008 |
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| Authors:
K Higgins; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) AIR VEHICLES DIV
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 | The aim of this report is to investigate the details and performance of several engineering correlation methods used for predicting skin friction and heat transfer rates in high-speed flows. These are the van Driest, Eckert and Spalding & Chi correlations, which, in the form presented herein, can only be used for zero-pressure-gradient flows. This limits the scope of the report to flow past flat plates, and also wedges and cones ... |
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| Characterization of PM2.5 Dust Emissions from Training/Testing Range Operations |
Aug-2008 |
58 pages |
| Authors:
John M Veranth; Vic Etyemezian; Judy C Chow; John G Watson; Erin Kaser; Raed Labban; Scott Speckart; Eric Pardyjak; Kevin Perry; Steve Kohl; UTAH UNIV SALT LAKE CITY
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| The goal of this study was to provide installation-level environmental staff with scientifically validated information for developing dust emission inventories, environmental assessments, and cost-effective dust control measures that are compatible with mission readiness. Source sampling, laboratory analysis of these samples, development of advanced sample analysis techniques, theoretical modeling, and measurement of field emissions and receptor site particulate samples constituted the major components of this study. |
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| Miniature High Density Scandate Cathodes for Linear Beam Devices |
14-Jul-2008 |
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| Authors:
Arthur Carpenter; Bernard K Vancil; Ivor Brodie; E BEAM INC BEAVERTON OR
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| The work was an investigation of recent promising results by workers in China on scandate impregnated cathodes. The improvement in dispenser cathode performance due to additions of small quantities of scandium oxide has been known since at least the 1980s. But workers in China have produced breakthrough performance with verified current loadings to 100 A/cm2. These results have not been fully reproduced or understood by cathode researchers in this country. ... |
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| Study of the Issues of Computational Aerothermodynamics Using a Riemann Solver |
01-Jul-2008 |
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| Authors:
James A Menart; Sean J Henderson; WRIGHT STATE UNIV DAYTON OH
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| This work is part of a project to more accurately model hypersonic flow. A number of issues in hypersonic flow are addressed. The first issue addressed is that of air properties at increased temperatures. Thermodynamic and transport properties of chemical equilibrium air are found for temperatures up to 30,000 K for a pressure range from 1x10-4 to 100 atm. This work also covers adding equilibrium air chemistry to the computational ... |
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| Investigation of Small-Caliber Primer Function Using a Multiphase Computational Model |
01-Jul-2008 |
36 pages |
| Authors:
John R Schmidt; Michael J Nusca; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
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| This report describes further development in the formulation of a primer model that is compatible with the ARL-NGEN3 code and small caliber weapons that takes in account multidimensional, multiphase interior ballistics codes, which employ coupled Eulerian-Lagrangian schemes to explicitly treat both the gas and solid phase. The model is based on the One Dimensional Turbulence modeling approach that has recently emerged as a powerful tool in multiphase simulations. Initial results ... |
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| High Order Accuracy Methods for Supersonic Reactive Flows |
25-Jun-2008 |
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| Authors:
David Gottlieb; Wai-Sun Don; BROWN UNIV PROVIDENCE RI DIV OF APPLIED MATHEMATICS
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| A multi-domain spectral method with stable and conservative penalty interface conditions for the numerical simulation of supersonic reactive recessed cavity flows with inhomogeneous grid is developed. The high order hybrid Spectral-WENO finite difference method under multi-domain framework is also introduced for the numerical solution of two dimensional nonlinear hyperbolic conservation laws in a Cartesian physical domain. A different approach in attempting to get more meaningful resultss is to model statistically ... |
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| Background Pressure Effects on Internal and Near-field Ion Velocity Distribution of the BHT-600 Hall Thruster (Preprint) |
24-Jun-2008 |
10 pages |
| Authors:
Michael R Nakles; Hargus; William A Jr; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
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| Presented is a study of the effects of chamber background pressure on the ion axial velocity distribution within the discharge chamber and in the near-field of the Busek BHT-HD-600 xenon Hall effect thruster. Ion velocity distributions were measured along the acceleration channel centerline using laser-induced fluorescence of the 5d[4](sub 7/2)-6p[3](sub 5/2) xenon ion excited state transition. Measurements were taken at the lowest possible chamber background pressure and a pressure that ... |
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| Biologically Inspired Artificial Haircell Sensors |
23-Jun-2008 |
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| Authors:
Chang Liu; ILLINOIS UNIV AT URBANA-CHAMAPIGN
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| The use and development of unmanned aircraft has significantly increased recently. As electronics packages and equipment have decreased in size and weight, so have the potential dimensions of these aircraft. The ability of these vehicles to retain acceptable lift is highly sensitive to separation of flow over the lift surface. The team developed the design and fabrication process for high sensitivity artificial haircell sensors and characterized their performances. The sensors ... |
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| Quantitative Mixing Measurements of a Supersonic Injection COIL Nozzle with Trip Jets |
13-Jun-2008 |
170 pages |
| Authors:
Carrie A Noren; AIR FORCE RESEARCH LAB KIRTLAND AFB NM DIRECTED ENERGY DIRECTORATE
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| A supersonic nozzle with supersonic iodine injection was designed and studied with Planar Laser-Induced Fluorescence (PLIF). The nozzle simulates Chemical Oxygen Iodine Laser (COIL) flow conditions with non-reacting, cold flows. A laser sheet near 565 nm excited the iodine, and the fluorescence was imaged with an intensified and gated CCD camera. Streamwise and semi-spanwise (oblique-view) images were taken, where the presence of injected flow was highlighted. With these images, the ... |
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| Human Systems Integration (HSI) Associated Development Activities in Japan |
12-Jun-2008 |
21 pages |
| Authors:
Hitoshi Narita; OFFICE OF NAVAL RESEARCH TOKYO GROUP APO SAN FRANCISCO 96503
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| This report covers the following topics: 1. Development of a user-friendly Japanese product -- 'Washlet'; 2. Challenges of Suwa industrial accumulation: co-evolution of technologies in industries and researches in universities; 3. High-performance CFD-based global optimization for high-speed multi-hull ship design; 4. Decision making training through gaming simulation and agent-based modeling; 5. Application of genetic algorithms to plant design problems; and 6. Extracting tacit knowledge of plant operations through machine learning ... |
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| Dynamic Simulation of Particles in a Magnetorheological Fluid |
01-Jun-2008 |
81 pages |
| Authors:
Joseph M Spinks; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The mechanical and rheological properties of a MR fluid depend on the induced microstructure of the imbedded ferrous particles. When subject to an external field these particles magnetize and align themselves in chains parallel to the applied magnetic field. The microstructure of these chains is a function of several parameters including particle size, applied magnetic field strength, and viscosity and velocity of the surrounding fluid. This thesis will create a ... |
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| Observations of Turbulent Fluxes and Turbulence Dynamics in the Ocean Surface Boundary Layer |
01-Jun-2008 |
117 pages |
| Authors:
Gregory P Gerbi; MASSACHUSETTS INST OF TECH CAMBRIDGE JOINT PROGRAM IN APPLIED OCEAN SCIENCE AND ENGINEERING
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| This study presents observations of turbulence dynamics made during the low winds portion of the Coupled Boundary Layers and Air-Sea Transfer experiment (CBLAST-low) in the ocean surface boundary layer. Observations include turbulent fluxes, turbulent kinetic energy, and the length scales of flux-carrying and energy-containing eddies. The observations of turbulent fluxes allowed the closing of heat and momentum budgets across the air-sea interface. The flux-carrying eddies are similar in size to ... |
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| Initial Characterization of Three-Dimensional Flow Separation in a Compressor Stator (Preprint) |
01-Jun-2008 |
16 pages |
| Authors:
S T Bailie; Grant A Hile; Steven L Puterbaugh; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE
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| A research program is underway seeking to effect a net decrease in aerodynamic loss of a moderately loaded axial compressor stator passage across varying operating conditions. Three dimensional boundary layer separation, typical at the suction surface corners, can differ greatly from classical two dimensional separation, and is the dominant loss and blockage generating feature in the diffusing flowfield of compressor stators. The initial research phase is presently described, wherein a ... |
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| A Snapshot Decomposition Method for Reduced Order Modeling and Boundary Feedback Control (Postprint) |
01-Jun-2008 |
17 pages |
| Authors:
R C Camphouse; James H Myatt; Ryan F Schmit; M N Glauser; J M Ausseur; M Y Andino; R D Wallace; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
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| In this paper, we develop a reduced basis construction method that allows for separate consideration of baseline and actuated dynamics in the reduced modeling process. A prototype initial boundary value problem, governed by the two-dimensional Burgers equation, is formulated to demonstrate the utility of the method in a boundary control setting. Comparisons are done between reduced and full order solutions under open-loop boundary actuation to illustrate advantages gained by separate ... |
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| Solving Multi-Dimensional Problems of Gas Dynamics Using MATLAB |
01-Jun-2008 |
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| Authors:
L K Antanovskii; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) WEAPONS SYSTEMS DIV
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| This report describes and implementation of a Godunov-type solver for gas dynamics equations in MATLAB(trade name). The main attention is paid to providing a generic code that can be easily adapted to particular problems in one, two or three dimensions. This is achieved by employing a cell connectivity matrix thus allowing on to use various structured and unstructured meshes without modification of the core solver. The code has been thoroughly ... |
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| Turbulent Convection in an Anelastic Rotating Sphere: A Model for the Circulation on the Giant Planets |
01-Jun-2008 |
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| Authors:
Yohai Kaspi; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
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| This thesis studies the dynamics of a rotating compressible gas sphere, driven by internal convection, as a model for the dynamics on the giant planets. We develop a new general circulation model for the Jovian atmosphere, based on the MIT-gcm dynamical core augmenting the nonhydrostatic model. The grid extends deep into the planet's interior allowing the model to compute the dynamics of a whole sphere of gas rather than a ... |
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| Improved Kinetic Models for High-Speed Combustion Simulation |
01-Jun-2008 |
161 pages |
| Authors:
C J Montgomery; Q Tang; A F Sarofim; M J Bockelie; J K Gritton; J W Bozzelli; F C Gouldin; E M Fisher; S Chakravarthy; REACTION ENGINEERING INTERNATIONAL SALT LAKE CITY UT
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| Report developed under an STTR contract. The overall goal of this STTR project has been to improve the realism of chemical kinetics in computational fluid dynamics modeling of hydrocarbon-fueled scramjet combustors. A new, pressure-dependent detailed chemical kinetic model for a JP-8 surrogate has been created. Extinction strain rate measurements have been performed with an opposed-jet burner at subatmospheric conditions for a variety of fuels, namely: methane, ethylene, n-heptane, Jet A, ... |
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| Minimum Pressure Envelope Cavitation Analysis Using Two-Dimensional Panel Method |
01-Jun-2008 |
102 pages |
| Authors:
Christopher J Peterson; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF MECHANICAL ENGINEERING
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| An analysis tool for calculating minimum pressure envelopes was developed using XFOIL. This thesis presents MATLAB(registered) executables that interface with a modified version of XFOIL for determining the minimum pressure of a foil operating in an inviscid fluid. The code creates minimum pressure envelopes, similar to those published by Brockett (1965). XFOIL, developed by Mark Drela in 1986, is a design system for Low Reynolds Number Airfoils that combines the ... |
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| Shock Capturing with PDE-Based Artificial Viscosity for an Adaptive, Higher-Order Discontinuous Galerkin Finite Element Method |
01-Jun-2008 |
144 pages |
| Authors:
Garrett E Barter; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF AERONAUTICS AND ASTRONAUTICS
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| The accurate simulation of supersonic and hypersonic flows is well suited to higher-order (p >1), adaptive computational fluid dynamics (CFD). Since these cases involve flow velocities greater than the speed of sound, an appropriate shock capturing for higher-order, adaptive methods is necessary. Artificial viscosity can be combined with a higher-order discontinuous Galerkin finite element discretization to resolve a shock layer within a single cell. However, when a nonsmooth artificial viscosity ... |
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| 2007 Program of Study: Boundary Layers |
Jun-2008 |
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| Authors:
Claudia Cenedese; John A Whitehead; Joseph Pedlosky; Steven Lentz; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
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| The topic of the Principal Lectures for the forty-ninth year of the program was Boundary Layers. The subject centers around those problems in which the boundary conditions lead to a large gradient near the boundary. Nine of this year's principal lectures were given by Joe Pedlosky and the tenth was given by Steve Lentz. The fluid mechanics of boundary layers was reviewed, first starting from its classical roots and then ... |
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| Active and Passive Control of Supersonic Wakes: Numerical Investigations using DNS and LES |
Jun-2008 |
41 pages |
| Authors:
Hermann F Fasel; ARIZONA UNIV TUCSON
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| At supersonic speed the base drag of blunt axisymmetric bodies can makeup a substantial fraction of the total drag. A reduction of the base drag is highly desirable as it would considerably improve aerodynamic performance. We employed computational fluid dynamics for investigating transitional supersonic axisymmetric wakes at a freestream Mach number of M=2.46 and a Reynolds number based on diameter of Re_D=100,000. For these simulations, to lower the grid resolution ... |
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| Ultrasonically Absorptive Coatings for Hypersonic |
13-May-2008 |
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| Authors:
David Marshall; Alexander Fedorov; Norman D Malmuth; TELEDYNE SCIENTIFIC AND IMAGING LLC THOUSAND OAKS CA
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| Laminar flow control (LFC) technologies reduce heat-transfer rates as well as the weight and complexity of thermal protection system (TPS). The laminar run can be substantially increased using an ultrasonically absorptive coating (UAC). The project is focused on maturing of the UAC-LFC methodology. Key components of the effort include wind-tunnel experiments, theoretical analysis, direct numerical simulation, fabrication and testing of ceramic materials that integrate UAC and TPS functions. To aid ... |
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| A Parallel Implementation of Three-Dimensional, Lagrangian Shallow Water Equations |
07-May-2008 |
91 pages |
| Authors:
Daniel D Hartig; NAVAL ACADEMY ANNAPOLIS MD MATHEMATICS AND SCIENCES DIV
|
| This project developed fluid circulation models for the two- and three-dimensional Lagrangian shallow water equations. There were two stages to this development: in the first, the two-dimensional shallow water equations were transformed from first principles of oceanography into a serial implementation in MATLAB. In the second part, a serial implementation of the three-dimensional shallow water equations, developed by Dr. James Greenberg, was modified to run in parallel on many nodes ... |
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| Effects of a Variable-Phase Transverse Acoustic Field on a Coaxial Injector at Subcritical and Near-Critical Conditions (Preprint) |
01-May-2008 |
12 pages |
| Authors:
Juan I Rodriguez; Ivett A Leyva; Douglas Talley; Bruce Chehroudi; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
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| An experimental study that focuses on the effects of a variable transverse acoustic field on an N2 shear coaxial jet is presented. The coaxial jet is exposed to different acoustic conditions by varying the phase between two acoustic sources. The main objective of this investigation is to analyze the effect of transverse acoustic forcing with variable phase on the magnitude of the inner-jet dark-core length. The coaxial jet is exposed ... |
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| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix M - Minimum and Maximum Plots for Prescribed Roll Motion of Model 5613 |
01-May-2008 |
647 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains plots and tables related to the minimum and maximum value of each variable versus the roll amplitude phi(a) for the prescribed roll motion of Model 5613 in task 1. The plots are found in Figures M-1 through M-114. For each variable, speed, and frequency there is one plot that depicts the results from all the codes. If f stands for a time-dependent variable, then the quantities plotted ... |
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| A Theoretical Study of Leading Edge Noise |
May-2008 |
41 pages |
| Authors:
Stewart Glegg; FLORIDA ATLANTIC UNIV BOCA RATON DEPT OF OCEAN ENGINEERING
|
| The report describes a theoretical procedure for calculating leading edge noise which addresses the differences found between current theoretical calculations and wind tunnel measurements of unsteady lift on airfoils in turbulent flow. The results have been compared with experiments carried at in a companion study at Virginia Tech by Dr. William Devenport. It was concluded that the effect of angle of attack on the radiated noise is relatively weak but ... |
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| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix D - Time History Plots for Prescribed Roll Motion of Model 5514 |
May-2008 |
1280 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains all plots and tables for the simulations involving 1-DOF prescribed roll motion of Model 5514 scaled to the length 142 m. Each of Figures D-1 through D-570 contains time-history plots of results from all codes for a single variable during one period of motion. If the code runner did not supply the data, the data vanish identically, or the data are insufficient for a single period, there ... |
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| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix E - Time History Plots for Prescribed Pitch Motion of Model 5613 |
May-2008 |
675 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains all the plots and tables for the simulations involving 1-DOF prescribed pitch motion of Model 5613 scaled to the length 154 m. Each of Figures E-1 through E-300 contains time-history plots of the results from all codes for a single variable during one period of motion. If the code runner did not supply the data, the data vanish identically, or the data are insufficient for a single ... |
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| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix F - Time History Plots for Prescribed Pitch Motion of Model 5514 |
May-2008 |
675 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains all the plots and tables for the simulations involving 1-DOF prescribed pitch motion of Model 5514 scaled to the length 142 m. Each of Figures F-1 through F-300 contains time-history plots of the results from all codes for a single variable during one period of motion. If the code runner did not supply the data, the data vanish identically, or the data are insufficient for a single ... |
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| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix G - Time History Plots for 0-DOF Motion of Model 5613 in Waves |
May-2008 |
2242 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains all the plots and tables for the simulations involving prescribed 0-DOF motion in waves of Model 5613 scaled to the length 154 m. Each of Figures G-1 through G-1000 contains time-history plots of the results from all codes for a single variable during one period of motion. If the code runner did not supply the data, the data vanish identically, or the data are insufficient for a ... |
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| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix H - Time History Plots for 0-DOF Motion of Model 5514 in Waves |
May-2008 |
2242 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains all the plots and tables for the simulations involving prescribed 0-DOF motion in waves of Model 5514 scaled to the length 142 m. Each of Figures H-1 through H-1000 contains time-history plots of the results from all codes for a single variable during one period of motion. If the code runner did not supply the data, the data vanish identically, or the data are insufficient for a ... |
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| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix L - Minimum and Maximum Plots for Prescribed Heave Motion of Model 5514 |
May-2008 |
342 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains plots and tables related to the minimum and maximum value of each variable versus the nondimensional heave amplitude Zeta(a)/T for the prescribed heave motion of Model 5613 in task 1. The plots are found in Figures L-1 through L-60. For each variable, speed, and frequency there is one plot that depicts the results from all the codes. If f stands for a time-dependent variable, then the quantities ... |
|
| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix N - Minimum and Maximum Plots for Prescribed Roll Motion of Model 5514 |
May-2008 |
647 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains plots and tables related to the minimum and maximum value of each variable versus the roll amplitude a for the prescribed roll motion of Model 5514 in task 1. The plots are found in Figures N-1 through N-114. For each variable, speed, and frequency there is one plot that depicts the results from all the codes. If f stands for a time-dependent variable, then the quantities plotted ... |
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| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix P - Minimum and Maximum Plots for Prescribed Pitch Motion of Model 5514 |
May-2008 |
342 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains plots and tables related to the minimum and maximum value of each variable versus the pitch amplitude a for the prescribed pitch motion of Model 5514 in task 1. The plots are found in Figures P-1 through P-60. For each variable, speed, and frequency there is one plot that depicts the results from all the codes. If f stands for a time-dependent variable, then the quantities plotted ... |
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| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix I - Time History Plots for 2-DOF Wave Contouring Motion of Model 5613 |
May-2008 |
243 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains all plots and tables for simulations of task 3 involving 2-DOF nominal wave contouring of Model 5613 scaled to the length 154 m. It presents results for wave contouring in both beam and following seas. In either case the vertical position of the center of gravity is always at the water surface. For condition 1, where the ship undergoes prescribed heave and pitch motions in regular following ... |
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| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix Q - Minimum and Maximum Plots for 0-DOF Motion of Model 5613 in Waves |
May-2008 |
1153 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains plots and tables related to the minimum and maximum value of each variable versus wave steepness for the 0-DOF prescribed motions of Model 5613 in task 2. The plots are found in Figures Q-1 through Q-226. For each variable, speed, and heading there is one plot that depicts the results from all the codes. If f stands for a time-dependent variable, then the quantities plotted are the ... |
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| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix J - Time History Plots for 2-DOF Wave Contouring Motion of Model 5514 |
May-2008 |
243 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains all plots and tables for the simulations of task 3 involving 2-DOF nominal wave contouring of Model 5514 scaled to the length 142 m. It presents results for wave contouring in both beam and following seas. In either case the vertical position of the center of gravity is always at the water surface. For condition 1, where the ship undergoes prescribed heave and pitch motions in regular ... |
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| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix K - Minimum and Maximum Plots for Prescribed Heave Motion of Model 5613 |
May-2008 |
342 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains plots and tables related to the minimum and maximum value of each variable versus the nondimensional heave amplitude Zeta(a)/T for the prescribed heave motion of Model 5514 in task 1. The plots are found in Figures K-1 through K-60. For each variable, speed, and frequency there is one plot that depicts the results from all the codes. If f stands for a time-dependent variable, then the quantities ... |
|
| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix O - Minimum and Maximum Plots for Prescribed Pitch Motion of Model 5613 |
May-2008 |
342 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains plots and tables related to the minimum and maximum value of each variable versus the pitch amplitude a for the prescribed pitch motion of Model 5613 in task 1. The plots are found in Figures O-1 through O-60. For each variable, speed, and frequency there is one plot that depicts the results from all the codes. If f stands for a time-dependent variable, then the quantities plotted ... |
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| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix R - Minimum and Maximum Plots for 0-DOF Motion of Model 5514 in Waves |
May-2008 |
1109 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains plots and tables related to the minimum and maximum value of each variable versus wave steepness for the 0-DOF prescribed motions of Model 5514 in task 2. The plots are found in Figures R-1 through R-226. For each variable, speed, and heading there is one plot that depicts the results from all the codes. If f stands for a time-dependent variable, then the quantities plotted are the ... |
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| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix B - Time History Plots for Prescribed Heave Motion of Model 5514 |
May-2008 |
675 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains all the plots and tables for the simulations of task 1 that involve 1-DOF prescribed heave motion of Model 5514 scaled to the length 142 m. Each of Figures B-1 through B-300 contains time-history plots of the results from all codes for a single variable during one period of motion. If the code runner did not supply the data, the data vanish identically, or the data are ... |
|
| Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments. Appendix A - Time History Plots for Prescribed Heave Motion of Model 5613 |
May-2008 |
675 pages |
| Authors:
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| This appendix contains all the plots and tables for the simulations of task 1 that involve 1-DOF prescribed heave motion of Model 5613 scaled to the length 154 m. Each of Figures A-1 through A-300 contains time-history plots of the results from all codes for a single variable during one period of motion. If the code runner did not supply the data, the data vanish identically, or the data are ... |
|
Fluid Mechanics
