| Internal Tidal Hydrodynamics and Ambient Characteristics of the Adriatic (ITHACA) |
31 DEC 2006 |
107 pages |
| Authors:
Mirko Orlic; Gordana Beg Paklar; Vlado Dadic; Nenad Leder; ZAGREB UNIV (CROATIA)
|
 | Field phase of the ITHACA project has been carried out between February and September 2006. During the experiment (1) meteorological conditions were documented by permanent stations in the area (Split-Marjan, Dubrovnik, Komiza, Hvar and Palagruza); (2) optical surveys were performed twice at stations Bisevo, Susac and Lastovo; (3) shipboard CTD surveys were carried out on four occasions at an along-basin transect comprising 13 closely spaced stations; (4) thermistor data were ... |
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| Air-Inflated Fabric Structures |
05 NOV 2006 |
32 pages |
| Authors:
Paul V. Cavallaro; Ali M. Sadegh; NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI
|
| Air-inflated fabric structures fall within the category of tensioned structures and provide unique advantages in their use over traditional structures. These advantages include light weight designs, rapid and self-erecting deployment, enhanced mobility, large deployed-to-packaged volume ratios, fail-safe collapse, and possible rigidification. Most of the research and development pursued in air-inflated structures can be traced to space, military, commercial, marine engineering and recreational applications. Examples include air ships, weather balloons, inflatable ... |
|
| Evaluation of Ground Vibrations Induced by Military Noise Sources |
AUG 2006 |
73 pages |
| Authors:
Donald G. Albert; Patrice Boulanger; Keith Attenborough; Michael J. White; ENGINEERING RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
|
| Measurements from locations with a variety of ground types were analyzed to determine the mechanisms and levels of the ground vibrations produced by airborne detonations of C4. The measurements show that an early seismic arrival from an underground path is always much smaller than the vibration induced by the air blast arrival. The acoustic-to-seismic coupling ratio for the atmospheric wave is a constant with respect to distance and peak pressure ... |
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| Detonation Initiation by Annular Jets and Shock Waves |
05 MAY 2005 |
21 pages |
| Authors:
Joseph E. Shepherd; CALIFORNIA INST OF TECH PASADENA
|
| This project was an experimental test of the concept of initiating detonations in PDEs with imploding shock waves. The existing 6-inch shock tube at Caltech was used to create hot, high pressure air behind a reflected shock wave. The hot air created an imploding annular shock wave when it jetted through an annular orifice into a 76 mm diameter, 1 m long tube attached to the end of the shock ... |
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| Experiences with Seakeeping Capabilities of SES Ships |
OCT 2004 |
12 pages |
| Authors:
Sverre Steen; MARINTEK TRONDHEIM (NORWAY)
|
| SES ships are known to have more favourable motions in high sea states than for instance catamarans. On the other hand, pressure variations in the air cushion might induce high levels of high-frequency accelerations in lower sea states, where other ships have no problems at all. Leakage of air from the air cushion due to relative motions between the ship and the sea leads to loss of pressure, increased resistance ... |
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| The Incorporation of Heating Effects in Atmospheric Pressure Gas Discharge |
07 APR 2004 |
2 pages |
| Authors:
A. P. Papadakis; G. E. Georghiou; A. C. Metaxas; CAMBRIDGE UNIV (UNITED KINGDOM) DEPT OF ENGINEERING
|
| The latest extension of the FE-FCT algorithm used for the solution of gas discharge problems is presented in this paper. The solution of Navier Stoke's equations is coupled to the continuity and Poisson's equations to account for the heating effects of the neutral gas species in near atmospheric pressure gas discharges. Adaptive meshing techniques that adjust the mesh in time are also incorporated, so that the highly transient phenomena involved ... |
|
| Suitability of Nonin Models 8500 and 9500 Pulse Oximeters, and Model 9847 Pulse Oximeter, and Carbon Dioxide Detector for Use in Hyperbaric Chambers |
FEB 2004 |
13 pages |
| Authors:
Gary W. Latson; NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
|
| Pulse oximetry has proven to be a valuable clinical monitor of respiratory adequacy in many healthcare settings. It is considered to be "standard of care" in many critical care settings such as operating rooms, intensive care units, and procedure rooms where sedation is administered. Although most patients in hyperbaric chamoers are well oxygenated by virtue of the fact that they are breathing oxygen at hyperbaric pressures, some situations could result ... |
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| Dynamic Impulse Calibration of 100 MPa Blast Pressure Transducers |
NOV 2003 |
|
| Authors:
Frank Marian; Phillip Box; Andrew McLean; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) PLATFORM SCIENCES LAB
|
 | Maritime Platforms Division (MPD) has manufactured a calibrator for determining the sensitivities of air blast and underwater pressure transducers with nominal ranges up to 100,000 kPa, which is the design limit of the transfer standard used. This paper describes the design of the calibrator, the process and analysis used to provide traceable calibration results. |
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| Electron Heating in Atmospheric Pressure Air |
SEP 2003 |
78 pages |
| Authors:
Karl H. Schoenbach; OLD DOMINION UNIV RESEARCH FOUNDATION NORFOLK VA
|
| The use of microhollow cathode discharges (MHCD) as plasma cathodes has allowed us to generate stable, direct current atmospheric pressure glow discharges in air with dimensions up (0 centimeters, electron densities of 10 to the 13th power cm-3, and temperatures of not more than 2000 K. By sustaining the discharge through consecutive electrical pulses, with duration of less than the time constant for flow-to-arc transition, the required electrical power density ... |
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| Synthesis of Compliant Structures for Adaptive Shape Change with Distributed Pressure Loads |
SEP 2002 |
9 pages |
| Authors:
Sridhar Kota; MICHIGAN UNIV ANN ARBOR DEPT OF MECHANICAL ENGINEERING
|
| The objective of this research is to develop mathematical formulations to perform systematic design (synthesis) of compliant structures for prescribed shape change under distributed pressure (air) loads During the past three years, the PIs developed a scientific basis for synthesizing compliant mechanisms for static and kinetostatic problems based on linear as well as nonlinear elastic deformation assumptions and concentrated loads Formulations for dynamic analysis of compliant structures were also developed ... |
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| Calculating Low-Atmosphere Profile and Turbulence Information from Meteorological Sensors Fitted to Battlefield Robotics Systems |
MAY 2002 |
17 pages |
| Authors:
Arnold Tunick; Stuart Young; Robert Winkler; ARMY RESEARCH LAB ADELPHI MD
|
| This report describes a new data analysis and interpretation algorithm developed for a precision meteorological sensor that has been fitted to one of the Army Research Laboratory's (ARL) prototype robotics vehicles. The new algorithm provides low-atmosphere profile and turbulence information from the retrieval and analysis of wind speeds, wind directions, air pressure, and temperatures (1 Hz data). The algorithm is at first formulated for data collected over flat terrain at ... |
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| Calculating Low-Atmosphere Profile and Turbulence Information from Meteorological Sensors Fitted to Battlefield Robotics Systems |
2002 |
15 pages |
| Authors:
Arnold Tunick; Stuart Young; Robert Winkler; ARMY RESEARCH LAB ADELPHI MD
|
| This report describes a new data analysis and interpretation algorithm developed for a precision meteorological sensor that has been fitted to one of the Army Research Laboratory's (ARL) prototype robotics vehicles. The new algorithm provides low-atmosphere profile and turbulence information from the retrieval and analysis of wind speeds, wind directions, air pressure, and temperatures (1 Hz data). The algorithm is at first formulated for data collected over flat terrain at ... |
|
| Capillary Tension in Rotting Ice Layers |
SEP 2001 |
21 pages |
| Authors:
Rachel E. Jordan; Jeffrey A. Stark; ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
|
| This study examines the moisture tension constituent relationship of ice near 0 C by measuring its moisture characteristic curve. In this novel approach, we held ice samples in a Tempe cell submerged in a cold bath and removed water from the ice veins through incremental increases in air pressure. Observed air entry and water re-entry pressures generally support an idealized flow path model of alternating vein segments and nodes. Re-entry ... |
|
| LAPTOP-CAPABLE HUMAN VISION MODEL, |
AUG 2001 |
|
| Authors:
Theodore J. Doll; MORRIS C. HETZLER; WILLIAM R. OWENS; GEORGIA TECH RESEARCH INST ATLANTA
|
| (U) THIS PAPER DISCUSSES A MODEL OF HUMAN VISION AND VISUAL COGNITION THAT CAN BE RUN UNDER MICROSOFT WINDOWS ON A HIGEND LAPTOP PC. THE MODEL AUTOMATES MANY OF THE IMAGE CONVERSION AND PARAMETER SETTING TASKS. THE SYSTEM INCLUDES WHAT THE AUTHORS CLAIM ARE IMPROVEMENTS OVER OTHER MODELS, INCLUDING EFFICIENT IMAGE PROCESSING ALGORITHMS FOR FASTER INPUT, AND OTHER FACTORS. THE MODEL CAN BE USED PURPORTEDLY TO EVALUATE CCD EFFECTIVENESS IN ... |
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| Computational Investigation of Atomization |
31 MAR 2000 |
45 pages |
| Authors:
Gretar Tryggvason; MICHIGAN UNIV ANN ARBOR DEPT OF MECHANICAL ENGINEERING AND APPLIED MECHANICS
|
| The secondary breakup of liquid fuel drops was studied by numerical simulations. The Navier-Stokes equations were solved by a finite difference/ front tracking technique that included inertia, viscous forces, and surface tension at the deformable boundary between the fuel and the air. The breakup of drops accelerated impulsively was studied by axisymmetric simulations for two different density ratios (1.15 and 10). The low density ratio ... |
|
| Countermeasure Device with Air Bag Hover System and Pressure Compensated Acoustic Projectors |
28 FEB 2000 |
13 pages |
| Authors:
Robert J. Obara; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A countermeasure device which is supplied with air in order to actively compensate for external water pressure at any depth, is disclosed. The countermeasure includes an air bag hover system and one or more acoustic projectors, both of which are connected by an air line to a high pressure air source. A sensor is provided which measures the external water pressure and transmits the measurements to a microprocessor. Upon sensing ... |
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| Structural Analysis and Modeling for Command Decisions During Fire on Board Ships |
JUN 1999 |
105 pages |
| Authors:
Yevgeniy V. Nikitin; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis examine opportunities for the application of information technology through mathematical modeling and design of a new method of a ship's space monitoring for the support of command decisions during a fire aboard. Thesis analyzes peculiarities of a fire and difficulties inherent in gathering data, particularly the lack of objective information about a fire scale, fire dynamics, and timing of functioning the ship's equipment during an emergency aboard. It ... |
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| Calculating the Microstructure of Atmospheric Optical Turbulence |
DEC 1998 |
20 pages |
| Authors:
Arnold Tunick; ARMY RESEARCH LAB ADELPHI MD
|
| Turbulent fluctuations in air density can cause significant distortions of an electromagnetic signal or image. Density fluctuations can be described in terms of air temperature, air pressure, water vapor, and CO2 content. We can calculate the refractive index structure constant, Cn2, with the fine scale dynamics of heat, moisture, and momentum diffusion. This helps us to quantify the intensity of turbulence induced refraction. A better understanding of turbulence induced refraction ... |
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| Submersible Device Launcher |
25 AUG 1998 |
|
| Authors:
Delfino D. Ferreira; Nicholas O. Venier; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A submersible device launcher includes an external cage structure including at least a base, an overhead reinforcing member and a plurality of corner posts connecting the base to the overhead reinforcing member. A launcher barrel is mounted to the external cage structure, a half-wall is mounted to and braced against the base of the external cage structure at a peripheral edge thereof, and an impulse cylinder is mounted to the ... |
|
| Testing and Evaluation of the LifePort, Inc., LifePort Patient Loading Utility System (PLUS) |
MAY 1998 |
19 pages |
| Authors:
Butch O. Blake; ARMSTRONG LAB BROOKS AFB TX CREW SYSTEMS DIRECTORATE
|
| The LifePort, Inc., LifePort Patient Loading Utility System (PLUS) is a six-foot patient care platform composed of the following features: a 124 Cu ft oxygen system with DISS or Ohio outlet which provides 3.8 hrs of oxygen at 15 lpm; two 518 watt inverters with one wired as a back-up, and only one is operational at a time; a 28 VDC vacuum system rated at 22 inHg with DISS or ... |
|
| MAKO Model KA7 BA-D Diesel Driven Portable Divers Air Compressor (Unmanned) |
DEC 1997 |
22 pages |
| Authors:
George D. Sullivan; NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
|
| Navy Experimental Diving Unit (NEDU) evaluated a Mako KA7 BA-D portable air compressor. The test took place at NEDU from 8 July through 17 July 1997. The purpose was to: Determine if the compressor system provides compressed air at the manufacturer's advertised pressures, flow rates and the quality and cleanliness required by the U.S. Navy. With the information gathered from the evaluation NEDU made a recommendation to ... |
|
| The National Shipbuilding Research Program. Reduced Volume of Spent Abrasive in Open Air Blasting |
DEC 1997 |
68 pages |
| Authors:
William Hitzrot; AVONDALE SHIPYARDS INC NEW ORLEANS LA
|
| Shipyards have been blast cleaning ships for more than 50 years. The methodology is still basically the same but numerous improvements have taken place over the years. The purpose of this project is to look at current blast cleaning technology, review what is being done by U. S. shipyards and define a strategy that will not only reduce the amount of abrasive being used for blasting operations but also increase ... |
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| Storage Stability Assurance of US Navy Aircraft Strategic Fuel Reserves |
15 SEP 97 |
54 pages |
| Authors:
Seetar G. Pande; Bruce H. Black; Dennis R. Hardy; NAVAL RESEARCH LAB WASHINGTON DC
|
| A reliable method is needed for predicting the long term storage stabilities of the military aviation turbine fuel reserves as well as for evaluating the effectiveness of antioxidants approved for these fuels. This report addresses this need. It describes a reliable and practical accelerated test method for predicting the peroxidation potential of aviation turbine fuels. A test methodology for evaluating antioxidants for future qualification in military specification, MIL-T-5624, is also ... |
|
| JTAGG II Brush Seal Test Results |
JUL 97 |
18 pages |
| Authors:
Gul K. Arora; Margaret P. Proctor; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER
|
| The Tri-services JTAGG II engine uses two identical brush seals, in tandem, located aft of the high pressure compressor. The engine operating conditions, at intermediate rated power (IRP), for this seal are estimated to be 50,000 rpm (899 ft/sec) speed, 175 psid air to air pressure differential and 1200 deg F air temperature. The testing was comprised of static air leakage, performance, seal offset, rotor run out tests and a ... |
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| Thermal Comfort Strategies: A Report on Cellulose Insulation |
DEC 96 |
33 pages |
| Authors:
Brian M. Deal; Robert J. Nemeth; Marilyn Adams; Lee P. DeBaillie; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| The U.S. Army maintains 979 million sq ft of space in 171,647 buildings worldwide. Thermal energy costs approximately $350 million per year, of which an estimated $84 million could be saved with simple building envelope construction techniques. Past design and construction standards depended on infiltration at weak points in the building envelope to bring fresh air inside. Extensive sealing and caulking followed by an introduction of outside air seems, at ... |
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| Blast-Induced Fragments from Detonations Inside Munitions Storage Structures |
Aug-1996 |
22 pages |
| Authors:
Khosrow Bakhtar; Michael M Swisdak; BAKHTAR ASSOCIATES NEWPORT BEACH CA
|
| The products of an accidental detonation in an above-ground storage magazine, with or without earth cover or in open stacks include: fire, airblast, and projection. For such mishaps, significant hazards are induced by fragments possessing high speeds and low angle paths. The hazardous effects associated with such projections are significantly reduced by storing explosives in chambers or magazines constructed below ground surface. The review of available reports and standards lead ... |
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| Evaluation of a Portable Shock Tube for Function Testing of Air Blast Pressure Transducers |
AUG 96 |
|
| Authors:
G. Yiannakopoulos; A. Pleckauskas; DEFENCE SCIENCE AND TECHNOLOGY ORGANIZATION CANBERRA (AUSTRALIA)
|
| Tests were conducted on a portable shock tube to study the pressure time profile emanating from the open end of the tube and its suitability for function testing of pressure transducers in the field in situ. The pressure pulse was generated from a 0.22 calibre blank cartridge and a piezoelectric pressure transducer was used to record the signal. Comparisons were made between the pressure time profiles generated by three types ... |
|
| Investigation of Preapproved Underground Heat Distribution Systems |
JUL 96 |
145 pages |
| Authors:
Charles P. Marsh; Nocholas M. Demetroulis; James V. Carnahan; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| The Department of Defense maintains and operates approximately 6,000 mi of steam and hot water heat distribution system piping, mostly underground. Even a small decrease in heat transmission efficiency could waste large amounts of energy, natural resources, and lead to increased greenhouse gas production. USACERL investigated and evaluated the physical condition and general performance of drainable-dryable heat distribution systems installed since 1981. Inspections covered 35 heat distribution systems at 15 ... |
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| Characterization of an Oxygen/Nitrogen Permeable Membrane System |
APR 96 |
29 pages |
| Authors:
Allan Abramowitz; Paul Boris; FEDERAL AVIATION ADMINISTRATION WASHINGTON DC OFFICE OF AVIATION RESEARCH
|
| The Federal Aviation Administration is investigating the use of alternate technologies for fire suppression aboard aircraft. A system was built using hollow fiber permeable selective membranes to separate air into its two major constituent gases, namely oxygen and nitrogen. System performance was characterized with regard to pressure, flow, temperature, and their affects on the nitrogen enriched stream. Test results indicate that nitrogen stream purity varies directly with air pressure and ... |
|
| Zero-Cost Electromagnetically Transparent Fluid Controlled Electrical Switch |
JAN 96 |
11 pages |
| Authors:
Vincent J. Ellis; ARMY RESEARCH LAB ADELPHI MD
|
| A remote fluidic controlled electric switch adaptation is disclosed. The adaptation is electromagnetically transparent and material costs are near zero. An electric switch, containing mechanically operated contacts, is modified by a flexible diaphragm secured next to the switch's mechanical contacts via uses an electromagnetically transparent housing. Pressurized fluid, either liquid or gas, enters the housing and inflates the diaphragm. This exerts positive pressure on the electric switch's mechanical contact and ... |
|
| Submersible Boat. |
03 JAN 1995 |
|
| Authors:
David B. Wyman; Joann Davis; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A submersible boat is provided which utilizes a planning boat hull with a sharp bow and blunt stern. The submersible boat performs as a planing boat until it nears the target location. Then, the boat submerges in order to avoid detection. After this vessel submerges, it travels with the blunt end forward and the sharp end aft. (MM) |
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| Technical Evaluation of the UH-60Q: Medical Oxygen System |
JAN 94 |
21 pages |
| Authors:
James E. Bruckart; Joseph R. Licina; ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL
|
| The UH-600 prototype MEDEVAC Black Hawk is configured to provide day/ night, adverse weather, emergency movement of patients. The objective of this report is to describe the results of performance tests on the medical oxygen system installed on the prototype aircraft. The medical oxygen system in the aircraft consists of a molecular sieve oxygen generating system (MSOGS) and support equipment. The MSOGS uses bleed air to produce high concentration oxygen. ... |
|
| Use of Seawater for Air Conditioning at Waikiki Convention Center |
94 |
|
| Authors:
Mike Williams; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| A Large part of operating costs of a hotel in Hawaii is the cost of energy for air conditioning. Building can be constructed to use energy more efficiently by using many methods, however, some of these method conflict with other concerns, aesthetics for example. Thus the process of designing and building an energy efficient hotel often involves trade-offs between energy efficiency and other objectives. The method proposed herein to reduce ... |
|
| In-Bed Multiport Sampling System |
DEC 93 |
17 pages |
| Authors:
L. C. Buettner; J. J. Mahle; D. K. Friday; EDGEWOOD RESEARCH DEVELOPMENT AND ENGINEERING CENTER ABERDEEN PROVING GROUND MD
|
| Knowledge of the transient behavior in fixed-bed separation processes is required to design advanced air purification systems. Measuring transient behavior experimentally can be difficult because of rapid changes in pressure and temperature in the bed. An apparatus has been developed which simultaneously isolates multiple vapor phase concentration samples at selected axial positions within the bed for subsequent analysis. Results are presented for the calibration operation of this sampling apparatus using ... |
|
| Shock Wave Interaction with L-Shaped Structures |
DEC 93 |
104 pages |
| Authors:
Richard C. Miller; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
| This study investigated the interaction of shock waves with L-shaped structures using the CTH hydrodynamics code developed by Sandia National Laboratories. Computer models of shock waves traveling through air were developed using techniques similar to shock tube experiments. Models of L-shaped buildings were used to determine overpressures achieved by the reflecting shock versus angle of incidence of the shock front. An L-shaped building model rotated 45 degrees to the planar ... |
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| Methane Challenge of High Performance Molecular Sieve Oxygen Concentrator |
NOV 93 |
8 pages |
| Authors:
Aaron M. Shakocius; George W. Miller; KRUG LIFE SCIENCES SAN ANTONIO TX SAN ANTONIO DIV
|
| The purpose of this work was to determine the ability of high performance molecular sieve oxygen concentrator (MSOC) to remove methane while operating at high oxygen purity levels. This work was accomplished using a laboratory scale, four-bed, high performance MSOC (U. S. patent 4,880,443) which consisted of two primary beds containing OXYSIV-5 zeolite molecular sieve and two secondary beds containing Takeda 3A carbon molecular sieve. The concentrator operated at an ... |
|
| Dispersion Effects on Millimeter Wavelength Attenuation Efficiencies for a Variety of Fibers |
AUG 93 |
23 pages |
| Authors:
C. W. Bruce; A. V. Jelinek; E. Crosby; R. Haloren; J. Hale; ARMY RESEARCH LAB WHITE SANDS MISSILE RANGE NM
|
| Results of several field experiments have been used to determine extinction efficiencies primarily of graphitic fibers and to relate these efficiencies to length distributions. Of the three dispersion techniques employed, two were driven by constant air pressure and the third dispersed fibers by explosive force. Generally, the latter significantly altered the distribution. When a significant proportion of the fibers was, fragmented to lengths shorter than a half wavelength, the efficiency ... |
|
| Laboratory Test and Evaluation Report of the Essex Model 60C-0037-2 Molecular Sieve Oxygen Generating System |
JUN 93 |
|
| Authors:
Brendan E. Squire; James E. Bruckart; Martin Quattlebaum; Leslie W. Johnston; ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL
|
| The Essex Model 6OC-0037-2 Molecular Sieve oxygen Generating System was tested for environmental and electromagnetic interference/compatibility under the U.S. Army Program for Testing and Evaluation of Equipment for Aeromedical operations. The tests were conducted using current military and industrial standards and procedures for environmental tests and electromagnetic interference/compatibility and human factors. The Essex Model 6OC-0037-2 performed properly in the test environments. The oxygen concentration produced by the unit depends on ... |
|
| Algorithm for Computing Monthly Averaged Inflow of Atlantic Water to the Norwegian Sea |
27 JAN 1993 |
22 pages |
| Authors:
T. A. McClimans; NORWEGIAN HYDROTECHNICAL LAB TRONDHEIM (NORWAY)
|
| Monthly averaged inflows of Atlantic Water to the Norwegian Sea from September 1982 to August l984 are estimated from sea level measurements at Harstad in Northern Norway. An algorithm calibrated to direct measurements at Stad to the south, taking into account air pressure and wind, reproduces nine months of field measurements at Shetland to within a standard deviation of 15 %. Based on indices from newer data and numerical modeling, ... |
|
| A Multi-Faceted Engineering Study of Aerodynamic Errors of the Service Aircraft Instrumentation Package (SAIP) |
SEP 92 |
119 pages |
| Authors:
Joseph W. Rixey; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The general objectives of this research are to investigate, identify, and quantify the aerodynamic sources of altitude determination errors of the U. S. Navy's Service Aircraft Instrumentation Package (SAIP) and to make recommendations to remedy these errors. This multi-faceted study includes aero- panel methods, computational fluid dynamics (CFD), wind tunnel testing, and flight test evaluations. The Airflow Sensor Assembly (ASA), a device similar to a calibrated pitot static tube, was ... |
|
| Modified Point Mass Trajectory Simulation for Base-Burn Projectiles |
MAR 92 |
48 pages |
| Authors:
R. F. Lieske; J. E. Danberg; ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| An addition to the Modified Point Mass Trajectory Model for Rocket- Assisted Projectiles is presented for the exterior ballistic simulation of base- bum projectiles. The addition models the change in aerodynamic base-drag based on the change in base pressure due to the base-bum motor's ejection of hot gas into the wake of the projectile. The mass flow rate of the remaining fuel of the base-bum motor is modeled as a ... |
|
| The Polar Automatic Weather Station Project of the University of Wisconsin, |
MAR 1992 |
|
| Authors:
Charles R. Stearns; George A. Weidner; WISCONSIN UNIV-MADISON DEPT OF METEOROLOGY
|
| The polar automatic weather station (AWS) of the University of Wisconsin is a battery-powered, solar panel-charged, computer-controlled unit that measures wind speed, wind direction, air temperature, air pressure, vertical temperature difference, and relative humidity. The nominal height of the measurements is three to five meters at the time of installation. The data are transmitted to polar-orbiting satellites equipped with the ARGOS data collection system. The sensors are measured at ten-minute ... |
|
| A Two-Year Record of the Climate on the Greenland Crest from an Automatic Weather Station, |
MAR 1992 |
|
| Authors:
George A. Weidner; Charles R. Stearns; WISCONSIN UNIV-MADISON DEPT OF METEOROLOGY
|
| An automatic weather station (AWS) was installed on the Greenland Summit (72.30 N, 38.00 W, 3210 m) in May 1987. The AWS unit operated for two years until May 1989 when it was moved to Fresh Air Site (72.82 N, 38.82 W, 3185 m), an air sampling site, where it is still operating. The AWS data were transmitted to the ARGOS data collection system on the NOAA polar-orbiting satellites. The ... |
|
| Snow Temperature Profiles and Heat Fluses Measured on the Greenland Crest by an Automatic Weather Station, |
MAR 1992 |
|
| Authors:
C. R. Stearns; G .A. Weidner; WISCONSIN UNIV-MADISON DEPT OF METEOROLOGY
|
| In June 1989 three automatic weather station (AWS) units were installed on the Greenland crest at the GISP2 (78.58 N, 38.46 W, 3265 m) and GRIP (78.57 N, 37.62 W, 3230 m) ice coring sites and at Kenton (72.28 N, 38.80 W, 3185 m), the air sampling site. The purpose of the AWS units is to measure the local meteorological variables, including snow temperatures at various depths, in support of ... |
|
| Surface Observation Climatic Summaries for Bitburg AB, Germany |
FEB 92 |
357 pages |
| Authors:
AIR FORCE ENVIRONMENTAL TECHNICAL APPLICATIONS CENTER SCOTT AFB IL
|
| Surface observation climatic summaries (SOCS) provide statistical climatic summaries of surface weather observations taken and recorded at specified USAF, civilian and foreign observing stations. Hourly observations are summarized from a 10-year period of record (POR). 'Summary of Day' (SOD) information is summarized from all available data in the OL-A, USAFETAC climatic database. |
|
| Low Force Cable Disconnect. |
21 MAY 1991 |
|
| Authors:
Paul E. Moody; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An underwater receptacle has a pressure balancing arrangement that balances the underwater force that tend to hold a receptacle and its mated plug together. The pressure balancing arrangement also relieves the air pressure formed between the insert discs of the plug and receptacle when connecting the insert discs respective electrical pins and sockets. This is achieved by moving the volume of air formed between the discs on connecting the respective ... |
|
| Effect of Temperature and Oxygen on the Strength of Elastomers |
MAR 91 |
|
| Authors:
A. N. Gent; Ginger L. Liu; T. Sueyasu; AKRON UNIV OH INST OF POLYMER ENGINEERING
|
| Measurements have been made of the tear energy G of SBR and BR vulcanizates as a function of rate of tearing, temperature, and air pressure. Approximately linear relations were obtained between the logarithm of the rate of tearing at a fixed energy input and the reciprocal of absolute temperature, over the range 25 to 130 C. Apparent activation energies of 20 to 32 kcal/mole were deduced for the tear strength, ... |
|
| Automated Handling and Assembling of Non-Rigid Objects |
14 JAN 91 |
|
| Authors:
Yuan F. Zheng; OHIO STATE UNIV COLUMBUS DEPT OF ELECTRICAL ENGINEERING
|
| In this period, three topics were studied. The first topic addresses the strategies of automated handling and assembling of non-rigid objects by using multiple end-effectors, the second topic studies the shape reconstruction of two dimensional objects, and the third topic is the construction of a laser range finder for identification of the third dimension of an object. The first topic investigated optimal tool structures for handling one and two dimensional ... |
|
| Follow-On Operational Test and Evaluation of the CPU-152/A Standard Central Air Data Computer (SCADC) |
21 AUG 90 |
|
| Authors:
OPERATIONAL TEST AND EVALUATION FORCE NORFOLK VA
|
| The purpose of the evaluation was to verify that all the deficiencies from OT-IIC OPEVAL has been corrected prior to approval for full fleet introduction. The evaluation was based on the results of non-scenario operational tests conducted under Project M756, supplemented by the results of OPEVAL, developmental testing, and operational experience. Based on this evaluation, the CPU-152/A SCADC as installed in the S-3A/B aircraft is determined to be operationally effective ... |
|
| Subjective Responses to Positive Pressure Breathing under Sustained High-G Using the Combat Edge System |
AUG 90 |
60 pages |
| Authors:
Kathy McCloskey; Lloyd Tripp; Daniel Repperger; Stephen Popper; Stephen Bolia; HARRY G ARMSTRONG AEROSPACE MEDICAL RESEARCH LAB WRIGHT- PATTERSON AFB OH
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| The two studies reported here were conducted during the check-out phase of an assisted positive pressure breathing system, known as COMBAT EDGE, being developed by the U.S. Air Force. Manned centrifuge tests of the regulator which controls air pressure to the oro-nasal mask and counterpressure vest provided an early opportunity to obtain subjective data concerning systems characteristics from subjects under high-G. Subjects underwent four different high-G profiles: 1) +9Gz maximum ... |
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Reports by Keyword(s)
AIR PRESSURE
