| A Critical Perspective on the Ultra-High Temperature Oxidation Problem (Preprint) |
13 Sep 2011 |
3 pages |
| Authors:
David W Lipke; Wesley P Hoffman; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
|
 | Scientists and engineers pushing the boundaries of aerospace and energy technologies have continually come against demanding materials challenges associated with elevated operating temperatures and abusive service environments. Clever design of material compositions and microstructures has advanced some technologies nearly to their theoretical limits (e.g., single crystal super alloys for turbine blades), although, disappointingly, many more materials have yet to fulfill their potential. Coatings remain a major obstacle holding back numerous ... |
|
| Applying MHD Results to a Scramjet Vehicle |
12 FEB 2007 |
49 pages |
| Authors:
Harold F. Chambers Jr; HFC CONSULTING WESTERVILLE OH
|
| The DOE MHD Power Generation Program contained a broad range of scientific, engineering, and modeling activities including the study of plasma composition and structure, equilibrium and non-equilibrium ionization, plasma flow, arc formation and extinction, high temperature materials, and non-intrusive gas diagnostics. In this report, results from the DOE Program, and related international activities, were reviewed for their potential to complement research conducted under the AFOSR Theme "Plasma Dynamics for Aerospace ... |
|
| Theoretical and Experimental Research of Capabilities of MHD Technology to Control Gas Flow with Non-Equilibrium Ionization |
10 MAY 2002 |
82 pages |
| Authors:
LENINETZ HOLDING CO NIPGS SAINT PETERSBURG (RUSSIA) HYPERSONIC SYSTEM RESEARCH INST
|
| This report results from a contract tasking Leninetz Holding Company, NlPGS as follows: The purpose of the project is the theoretical and experimental research of capabilities of using of MHD technology to control gas flow with non-equilibrium ionization. Cold gas flows will be considered, where thermal ionization of gas flow is negligible. The analysis of various methods of ionization will be carried out, and mathematical models of an ionizer and ... |
|
| Investigation of Non-Equilibrium Plasmas |
06 MAR 2002 |
416 pages |
| Authors:
Clark W. Hawk; ALABAMA UNIV IN HUNTSVILLE
|
| The research program investigated non-equilibrium plasmas with a variety of simple gases for the purpose of obtaining experimental data that can be used to anchor analytical models of flowing plasmas suitable for various electric propulsion devices. A microwave plasma generator(MPG) operating. at .2. 45GHz and 3kW was the initial source of the plasmas. The working fluids included: argon, helium, nitrogen, carbon dioxide, and water vapor. The research also included investigation ... |
|
| Militarily Critical Technologies. Part III. Developing Critical Technologies. Section 7: Energy Systems Technology |
NOV 1999 |
|
| Authors:
DEFENSE THREAT REDUCTION AGENCY DULLES VA
|
 | Developing Critical Technologies identifies those technologies that will produce increasingly superior performance of military systems or maintain a superior capability more affordably. The object of the document is to look beyond the Department of Defense (DoD) planning period (5+ years) and as far into the future as is reasonable. Although it may not be possible to identify all technologies that will be used in future military systems, the focus will ... |
|
| Development of Low Power Hall Thrusters |
JUN 1999 |
15 pages |
| Authors:
V. Hruby; J. Monheiser; B. Pole; P. Rostler; J. Kolencik; BUSEK CO INC NATICK MA
|
| Three different types of sub kilowatt class Hail thrusters tor on- board propulsion of small to mid size satellites are being developed at Busek. This paper describes their performance focusing on plasma behavior outside of the thrusters end contrasts the typical Hail thruster plasma with that encountered in MHD generators end accelerators researched in the past and familiar to the plasmadynamic community. A simple performance predicting analytical model. applicable to ... |
|
| 6TH European Symposium on Electromagnetic Launch Technology, The Hague, 25-28 May 1997. Proceedings |
03 JUN 97 |
|
| Authors:
PRINS MAURITS LABORATORIUM TNO RIJSWIJK (NETHERLANDS)
|
| The Final Proceedings for 6th European Symposium on Electromagnetic Launch Technology, 25 May 1997 - 28 May 1997. The Topics covered include: Pulsed power supplies, accelerators and projectiles and systems. |
|
| Study of Imploding Liner - Electrode Wall Interaction |
DEC 1994 |
52 pages |
| Authors:
Vladimir K. Chernyshev; Yo. I. Zharinov; I. D. Kudolkin; V. N. Ruzin; A. I. Ionov; RESEARCH INST OF EXPERIMENTAL PHYSICS ARZAMAS (RUSSIA)
|
| The report gives the results of the experiments on aluminum liner acceleration and their interaction with electrode walls. The liners having the radius of 30 mm, wall thickness of 1mm and 0.7 mm and a length of 30 mm are accelerated by a magnetic field, created by explosive magnetic generator (EMC). A helical generator 100 mm in diameter and 700 mm in length was used to create a magnetic field. ... |
|
| Electromagnetic Pump. |
15 FEB 1994 |
|
| Authors:
Richard L. Bonin; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A pump having a stator that forms a cylindrical chamber defined by a wall and a plurality of independently energizable magnetic field generators. A compression roller comprising a magnetic material is disposed within the wall and is free to move with respect to the stator. A flexible diaphragm is intermediate the stator and the compression roller and disposed along the wall portion. The flexible diaphragm to be pumped has an ... |
|
| Uranium ARC Fission Reactor for Space Power and Propulsion |
MAR 1992 |
40 pages |
| Authors:
Richard T. Schneider; Isaac Maya; Juan Vitali; RTS LABS INC ALACHUA FL
|
| Combining the proven technology of solid core reactors with uranium arc confinement and non-equilibrium dissociation and ionization by fission fragments can lead to an attractive power and propulsion system. The benefit ensues from using the high quality directed energy of fission fragments and associated radiation to obtain working fluid/propellant dissociation and ionization directly, without first degrading the energy to heat. The dissociation and ionization energies can be utilized in a ... |
|
| An MHD Heat Source Based on Intermetallic Reactions |
15 JUN 91 |
78 pages |
| Authors:
J. Sadjian; C. H. Marston; GENERAL SCIENCES INC SOUDERTON PA
|
| The main objective of this program was the development of an MHD heat source for potential use in Space Based Multi Megawatt, MHD Power Systems. The approach is based on extension of high temperature chemical/ion release technology developed by the General Sciences, Incorporated (GSI) team and successfully applied in other Space Applications. The relevance to the SDIO/MHD objectives is a natural one in that solid state restrictions have been identified ... |
|
| Computer Controlled MHD Power Consolidation and Pulse Generation System |
01 AUG 90 |
54 pages |
| Authors:
R. Johnson; K. Marcotte; M. Donnelly; MONTANA STATE UNIV BOZEMAN DEPT OF ELECTRICAL ENGINEERING
|
| The major goal of this research project is to establish the feasibility of a power conversion technology which will permit the direct synthesis of computer programmable pulse power. Feasibility has been established in this project by demonstration of direct synthesis of commercial frequency power by means of computer control. The power input to the conversion system is assumed to be a Faraday connected MHD generator which may be viewed as ... |
|
| Total Exhaust Containment System for MHD Power Systems |
01 DEC 89 |
55 pages |
| Authors:
S. T. Demetriades; C. D. Maxwell; M. Brouillette; G. S. Winckelmans; STD RESEARCH CORP ARCADIA CA
|
| This effort investigated the feasibility of a revolutionary approach to open cycle space power system exhaust containment. This approach makes use of state of the art U.S. materials technology and unique designs developed at STD Research Corporation to control the effects of effluents from open cycle MHD generators operating in space by bagging all the MHD exhaust products in light weight impermeable containers. Theoretical models for the operation of the ... |
|
| Nuclear Electric Magnetohydrodynamic Propulsion for Submarine |
MAY 89 |
|
| Authors:
Adalbert A. Bednarczyk; MASSACHUSETTS INST OF TECH CAMBRIDGE
|
| This thesis analyzes the superconducting technology for a shipboard magnetohydrodynamic propulsion system. Based on the the principles of magnetohydrodynamics (MHD), the concept of open water efficiency was used to optimize the preliminary design of the MHD thruster. After the baseline submarine hull, modeled after the Los Angeles class submarine, was selected propulsive efficiency and the top speed for four variant MHD submarines were evaluated. The design criteria were set at ... |
|
| Nuclear MHD Converter |
20 APR 89 |
113 pages |
| Authors:
G. Tuninetti; E. Botta; C. Criscuolo; P. Riscossa; F. Giammanco; ANSALDO S P A GENOA (ITALY)
|
| This work originates from the proposal "MHD Compressor-Expander Conversion System Integrated with a GCR Inside a Deployable Reflector" submitted by ANSALDO under PRDA RA-22-87PC90271, January 1987. The proposal concerned an innovative concept of nuclear, closed-cycle MHD converter for power generation on space-based systems in the multi-megawatt range. The basic element of this converter is the Power Conversion Unit (PCU) consisting of a gas core reactor directly coupled to an MHD ... |
|
| Summary and Evaluation of the Strategic Defense Initiative Space Power Architecture Study |
01 MAR 89 |
419 pages |
| Authors:
M. Edenburn; J. M. Smith; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER
|
| The Space Power Architecture Study (SPAS) identified and evaluated power subsystem options for multimegawatt electric (MMWE) space based weapons and surveillance platforms for SDI applications. Steady state requirements of <1 MMWE are adequately covered by the SP-100 nuclear space power program and hence were not addressed in the SPAS. Four steady state power systems <1 MMWE were investigated with little difference between them on a mass basis. The majority of ... |
|
| High Pulsed Power, Self Excited Magnetohydrodynamic Power Generation Systems |
27 DEC 85 |
132 pages |
| Authors:
B. Zauderer; E. Fleming; J. Wang; COAL TECH CORP MERION PA
|
| The objective of this study was to examine the feasibility of achieving high power, high energy, repetitive pulses over a multi-second period, using a portable, self-excited, magnetohydrodynamic (MHD) generator system. To assure a compact, portable system, a room temperature MHD magnet, and operation without a supersonic diffuser was assumed. The approach selected was to use a cw, self-excited, MHD generator to provide the power for the magnetic field in a ... |
|
| Finite Element Analysis of Magnetoelastic Plate Problems |
AUG 1981 |
|
| Authors:
K. Y. Yuan; CORNELL UNIV ITHACA N Y DEPT OF STRUCTURAL ENGINEERING
|
| Magnetic forces acting on conducting metal structures are significant in the design of such devices as fusion reactors, magnetohydrodynamic generators, magnetically levitated vehicles, magnetic forming devices, and various electric machines. The magnetic loads on these structures may be pulsed or cyclical and arise from the interaction between the induced eddy currents in the conductor and the externally applied magnetic fields. Moreover, the velocity and finite deformation of the conducting structure ... |
|
| Investigation of Nonideal Plasma Properties |
01 MAY 1981 |
|
| Authors:
Horst E. Wilhelm; FLORIDA UNIV GAINESVILLE DEPT OF ENGINEERING SCIENCES
|
| The electrical conductivity of nonideal classical and quantum plasmas is calculated by means of dimensional analysis, kinetic theory, and quantum field theoretical methods. The new conductivity formulas are compared with recent experimental conductivity data for nonideal alkali plasmas. A theory of the electric microfield distribution in thermal plasmas and the anomalous microfield driven diffusion of charged particles across magnetic fields is presented, which is applicable only to ideal and weakly ... |
|
| Study of Gas Dynamic Effects in Non-Uniform High Pressure Electrical Discharges. |
AUG 1980 |
|
| Authors:
Jon L. Barto; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This report examines gas dynamic stabilization of high pressure, highly non-uniform electrical discharges for two electrode geometries. The geometries studied are the multiple-point to plane and the multiple-wire to plane. A successful analytical model is developed utilizing the anode extension concept, which describes the interaction and stabilizing effects of flow, separating the effects of convection and turbulence, in the point-plane geometry. Comparisons of theory and data are presented, illustrating actual ... |
|
| Psuedo-Shock as a Qualitative Model in the Investigation of the Influence of Wall Roughness on the Performance of Supersonic MHD Generators. |
JUL 1980 |
|
| Authors:
Pau-Chang Lu; NEBRASKA UNIV LINCOLN DEPT OF MECHANICAL ENGINEERING
|
| A preliminary study, based on an extension of Crocco's pseudo-shock model, has been carried out to explain and predict qualitatively the rather gradual pressure rise in a supersonic MHD generator, to account for the influence of wall roughness on the core flow. A system of non-linear ordinary differential equations is formulated for the wall layer and core, with proper electromagnetic conditions enforced at the interface. Extensive numerical experiments are also ... |
|
| Electron Conductivity in Combustion Plasmas. |
MAR 1980 |
|
| Authors:
L. C. Pitchford; E. C. Beaty; JOINT INST FOR LAB ASTROPHYSICS BOULDER COLO
|
| The major uncertainty in the calculation of the conductivity in certain plasmas representative of those produced as combustion products in MHD generators is due to the uncertainty in the low energy momentum transfer cross sections for electron scattering in water vapor. The most reliable values of such low energy cross sections are those deduced from electron swarm experiments. The determination of cross sections from swarm experiments involves solving the Boltzmann ... |
|
| Energy Conversion. |
JUN 1979 |
|
| Authors:
DEFENSE DOCUMENTATION CENTER ALEXANDRIA VA
|
| This bibliography contains unclassified and unlimited citations of reports giving a review of research and development pertaining to energy conversion. Four computer-generated indexes are provided: Corporate Author-Monitoring Agency, Subject, Title and Personal Author. (Author) |
|
| Shock Physics of Nonideal Plasmas. |
30 APR 1979 |
|
| Authors:
Dennis W. Baum; W. Lee Shimmin; Robert F. Flagg; Stephen P. Gill; D. Mukherjee; ARTEC ASSOCIATES INC HAYWARD CALIF
|
| This study is an experimental investigation of nonideal plasmas produced by strong shock waves. The study centered about the understanding of factors controlling the specific energy and transport properties of dense plasma in an explosively energized plasma source. The study addressed specifically the gas cavity geometry, pressure-density effects, radial velocity effects, and size scaling. Both argon and xenon were used for the working gas. Shock speeds ranged from 25.9 to ... |
|
| A Numerical Scheme for Predicting Transient Shock, Boundary Layer, and Magnetohydrodynamic Phenomenia. |
DEC 1978 |
|
| Authors:
Laurence A. Feldman; ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFS TN
|
| A stable procedure of first order accuracy for solving the coupled axisymmetric transient gasdynamic and electromagentic equations is presented. A numerical integration technique developed by Matuska for inviscid flow is extended to include viscous and electromagnetic terms with stability, convergence and computational speed comparing favorably with other existing hydrocodes. In this investigation, the method is applied to a number of transient hydrodynamic and magnetohydrodynamic applications characterized by the interaction of ... |
|
| USAF-ASEE (1978) Summer Faculty Research Program (WPAFB). Volume I. |
NOV 1978 |
|
| Authors:
Cecil D. Bailey; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| Partial contents: Regularization of Ill-posed Problems; Unconditionally Stable Second Order Accurate Method for Transonic Flutter Calculations; Large Amplitude Response of Complex Structures due to High Intensity Noise; Synthesis of Manual and Automatic Control Applied to Integrated Fire and Flight Control; Catalytic Flame Stabilization for Aircraft Afterburners; Cadmium Deposition Reactions on Cadmium and Nickel Electrodes by Cyclic Voltammetry; Turbulent Flow Measurements ofr Sudden Expansion Cylindrical Tube Using Laser Doppler Velocimeter; Design ... |
|
| High Power Magnetohydrodynamic System. Volume II. |
JUL 1978 |
|
| Authors:
Daniel W. Swallom; Otto K. Sonju; D. E. Meader; H. Becker; MAXWELL LABS INC WOBURN MA
|
| The technical effort discussed in this report covers Phase B of the High Power Magnetohydrodynamic System program, which is a multi-phase program to develop liquid oxygen/liquid hydrocarbon magnetrohydrodynamic generators using cesium seed for high performance, portable power supply applications. During this phase a lightweight, high performance hot gas flow train using liquid oxygen and JP-4 was designed and component modeling completed. |
|
| High Power Magnetohydrodynamic System; Volume 2 |
JUL 1978 |
318 pages |
| Authors:
D. W. Swallom; O. K. Sonju; D. E. Meader; H. Becker; MAXWELL LABS INC WOBURN MA
|
| The technical effort discussed in this report covers Phase B of the High Power Magnetohydrodynamic System program, which is a multi-phase program to develop liquid oxygen/liquid hydrocarbon magnetohydrodynamic generators using cesium seed for high performance, portable power supply applications. During this phase a lightweight, high performance hot gas flow train using liquid oxygen and JP-4 was designed and component modeling completed. The magnetohydrodynamic channel/diffuser performance parameters which were used as ... |
|
| Pulsed-Power Research and Development in the USSR. |
MAY 1978 |
|
| Authors:
Simon Kassel; RAND CORP SANTA MONICA CALIF
|
| Part of a continuing study of Soviet R and D of high-current, high-energy charged-particle beams and their scientific and technological applications, this report discusses pulsed-power devices and elements, the basic means of energy delivery to all charged-particle beam systems. Specifically, it treats pulsed-power generation, storage, and switching. Soviet technical literature since 1960 was examined for data detailing both the organization and planning of Soviet pulsed-power R and D and the ... |
|
| Fuze for Explosive Magnetohydrodynamic Generator. |
25 APR 1978 |
|
| Authors:
George Webb; Keith D. Burgess; DEPARTMENT OF THE AIR FORCE WASHINGTON D C
|
| This patent describes an apparatus by which high explosive charges are propelled into and detonated at the center of an MHD-X generator. The high explosive charge units are engaged and propelled by a reciprocating ram device. Detonating in each instance is achieved by striking with a firing pin a detonator charge that is in register with a booster charge, the booster charge being in detonating communication with the high explosive ... |
|
| High Energy MHD Fuels Development Program. |
APR 1978 |
|
| Authors:
Richard E. Eckels; SYSTEMS RESEARCH LABS INC DAYTON OH AEROSYSTEMS RESEARCH DIV
|
| An analytical study compared the electrical conductivity and velocity squared product for several MHD liquid or liquified fuels. Aluminum additive to liquid hydrocarbon was found to be attractive for high power density MHD. A number of MHD power tests showed that developed emulsified slurry fuels were engineeringly feasible. Various emulsification processes are described. (Author) |
|
| Investigations of the Dynamics of MHD Flows. |
10 JAN 1978 |
|
| Authors:
COLORADO STATE UNIV FORT COLLINS DEPT OF ELECTRICAL ENGINEERING
|
| Exact similarity solutions are derived for the incompressible flow of electrically conducting, viscous fluids across homogeneous, axial magnetic fields and nonuniform, azimuthal magnetic fields in diffusers with plane walls. The velocity distributions in the MHD diffusers, the onset of flow separation, and the control of separation by means of magnetic fields are discussed under consideration of induced magnetic fields and viscous stress relaxation. The Stark-effect and (absorbtion) satellite spectra in ... |
|
| Rare Earth Ceramic Technology (U.S.S.R.). |
JAN 1978 |
|
| Authors:
Morton I. Kliman; ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS
|
| This study presents and documents an analysis of the sources and uses of rare earth element oxides and ceramics in the Union of Soviet Socialist Republics. The purpose of this study is to provide an adequate basis for the comprehension of the strategic background for the uses of rare earth compounds. With this knowledge the addition of new information can be properly applied to understand the level of technology and ... |
|
| Thermodynamic Analysis of a Tin-Steamed LMMHD System. |
29 JUL 1977 |
|
| Authors:
THERMO ELECTRON CORP WALTHAM MASS
|
| In this report, we evaluate the thermodynamic analyses and data of a tin-steam liquid metal magnetohydrodynamic power system proposed by Argonne National Laboratory, Argonne, Illinois, to the Office of Naval Research, Washington, D.C. Our evaluations consisted of: (1) an analysis of the ideal or limiting performance of the proposed system; (2) a comparison of the results obtained by means of a computer model developed by Argonne with those obtained by ... |
|
| Explosive MHD Research. |
31 MAY 1977 |
|
| Authors:
Stephen P. Gill; Dennis W. Baum; W. Lee Shimmin; Deb Mukherjee; ARTEC ASSOCIATES INC HAYWARD CALIF
|
| Research on dense nonideal plasmas used in explosive MHD pulse power generators is described. Experiments were performed with three types of explosive plasma sources producing a plasma pressure about 10 kbar and a plasma temperature about 5 eV (58,000 K). A literature survey was performed on theoretical methods for predicting the properties of nonideal plasmas, and calculations were performed using some of the models. Encouraging progress was made in reducing ... |
|
| A Fast Parabolic Module for the Solution of MHD Channel Flow Equations between Electrode Walls, |
25 FEB 1977 |
|
| Authors:
J. P. F. Lindhout ; H. Snel ; W. F. H. Merck; NATIONAL AEROSPACE LAB AMSTERDAM (NETHERLANDS)
|
| Two fourth-order methods, based on cubic-splines approximations, are proposed to solve parabolic differential equations. The cubic-splines approximation has a second-order accuracy, which is improved in both methods to fourth-order in different ways. In the first method, the second-order truncation term is estimated by differentiating twice the basic equations. In the other method a local Richardson extrapolation is applied at each marching station to obtain fourth-order accurate values at every two ... |
|
| Physical Phenomena in Flowing Plasmas at High Magnetic Fields. |
14 FEB 1977 |
|
| Authors:
R. H. Eustis; M. Mitchner; C. H. Kruger; R. K. Hanson; STANFORD UNIV CALIF DEPT OF MECHANICAL ENGINEERING
|
| A four-pin electrical conductivity probe has been developed which is capable of providing a continuous record of space-resolved values of the electrical conductivity of MHD generator plasmas. Preliminary measurements have been made of the effect of flow velocity on the indicated electrical conductivity. |
|
| Two-Phase Hartmann Flows in the MHD Generator Configuration. |
JAN 1977 |
|
| Authors:
E. R. Lindgren; U. H. Kurzweg; R. E. Elkins; T. A. Trovillion; FLORIDA UNIV GAINESVILLE DEPT OF ENGINEERING SCIENCES
|
| Two-phase Hartmann flows in an MHD generator duct of rectangular cross-section are examined and numerical values for the velocity fields and induced current streamlines for fluids of spatially-dependent electrical conductivity are determined as a function of load factor, Hartmann number and channel aspect ratio. This study is of considerable practical interest in connection with some experimental work on two phase liquid metal-gas MHD generators and the results presented herein may ... |
|
| Fundamental Mechanisms of Nonequilibrium MHD Lasing Phenomena. |
OCT 1976 |
|
| Authors:
Jack A. Kerrebrock; MASSACHUSETTS INST OF TECH CAMBRIDGE GAS TURBINE AND PLASMA DYNAMICS LAB
|
|
| Direct Energy Conversion Devices and Their Potential Naval Applications. |
OCT 1976 |
|
| Authors:
Chih Wu; NAVAL ACADEMY ANNAPOLIS MD ENERGY-ENVIRONMENT STUDY GROUP
|
| Direct energy conversion devices may be used as prime movers, refrigerating machines, etc. and are endowed with characteristics well suited to diverse naval applications. Despite this, not much effort has been invested in the U.S. Navy in their development. There is a real and urgent need for the initiation of substantial fundamental work in this area. Developments of thermoelectric converters, thermionic generators, photovoltaic cells, MHD systems and fuel cells are ... |
|
| High Power Study Superconducting Generators. |
01 MAR 1976 |
|
| Authors:
A. E. King; C. C. Kouba; J. L. McCabria; L. D. Smith; WESTINGHOUSE ELECTRIC CORP LIMA OHIO AEROSPACE ELECTRICAL DIV
|
| This report summarizes the results of a design study of light weight, high power electrical generators in the 10 to 50 Megawatt range with output voltages up to 200 kV dc (after rectification). Superconducting machines representing the latest technology were the focus of the study; non-superconducting machines utilizing the most advanced conventional design technologies were also studied to develop comparable performance data. Turbine requirements and integration features were studied to ... |
|
| Some Results of the Investigation of MHD Generators with Non-Equilibrium Conductivity |
02 JAN 1976 |
22 pages |
| Authors:
V. S. Golubev; V. A. Gurashvili; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSONAFB OH
|
| The authors investigated MHD generators with non-equilibrium conductivity, and also the physical properties of non-equilibrium plasmas typical for such generators. The results make it possible to conduct reliable calculations of the MHD generators. |
|
| High Power Study - Power Conditioning. |
JAN 1976 |
|
| Authors:
A. S. Gilmour Jr; STATE UNIV OF NEW YORK AT BUFFALO DEPT OF ELECTRICAL ENGINEERING
|
| This paper summarizes the power conditioning portion of the high power study that was performed for the Air Force Aero-Propulsion Laboratory by the State University of New York at Buffalo. This effort defines the power conditioning system and critical component developments which will be required to interface the airborne 10 MW to 50 MW sources defined under separate study efforts with certain loads. Power conditioning systems are considered for use ... |
|
| Limiting Mechanisms in MHD Generator Performance. |
DEC 1975 |
|
| Authors:
STANFORD UNIV CALIF HIGH TEMPERATURE GASDYNAMICS LAB
|
| Experimental and analytical studies were undertaken to investigate loss mechanisms in MHD generators associated with the boundary layers and the electrodes. Measurements were made of the electrode boundary layer profiles of velocity, static temperature, and electron number density in an operating MHD generator for both subsonic and supersonic flows. Good agreement with a theory which included MHD effects was obtained for subsonic flow and somewhat less satisfactory agreement for supersonic ... |
|
| Investigation of High Power MHD Gas Lasers. |
AUG 1975 |
|
| Authors:
Bert Zauderer; Eric Tate; C. H. Marston; GENERAL ELECTRIC CO PHILADELPHIA PA SPACE DIV
|
| This report presents the results obtained during the period January 1974 to June 1975 in the study of MHD powered gas lasers. Key results of the work thus far are: (1) The shock tunnel was substantially modified during the past 18 months to improve the quality of the experiments; (2) The gain measurements previously reported were repeated with substantial improvement in the signals; (3) An MHD channel was operated at ... |
|
| Imploding Liner Fusion Systems in Cusp-Ended Theta Pinch Geometry. |
AUG 1975 |
|
| Authors:
Peter J. Turchi; NAVAL RESEARCH LAB WASHINGTON D C
|
| Imploding liner flux compression techniques can be used to create and confine fusion plasmas at megagauss magnetic field levels, thereby allowing compact fusion systems of modest energy. The basic problem is to combine the methods of imploding liner flux compression with plasma configurations of suitable stability and simplicity. In this article, imploding liner fusion systems based on a cusp-ended theta pinch geometry are analyzed and basic scaling relationships are obtained. ... |
|
| SOVRaD - A Digest of Recent Soviet R and D Articles. Volume 1, Number 7, July 1975, |
JUL 1975 |
|
| Authors:
S. Hibben; L. Boylan; J. Kourilo; B. Shresta; M. Ness; INFORMATICS INC ROCKVILLE MD
|
| Contents: Ceramic for MHD generator; Aluminum-steel composite; New high-temperature superconducting material; Densification and metallization of condensed matter by shock waves; New boron nitride crystalline form; Soluble heat-resistant aromatic polyimides; Alloyed pyrographite; High strength and heat-resistant chromium alloy; Heat and thermal oxidation resistant poly(organosilazoxanes); Ocean optics research method; Optical characteristics of a point source in the ocean; Ocean water transparency; Magnetic effect on light propagation in water; Discharger for mega-ampere switching; ... |
|
| KIVA-I Extended Duration MHD Generator Development. |
JUN 1975 |
|
| Authors:
R. V. Shanklin III; J. K. Lytle; R. A. Nimmo; L. W. Buechler; H. W. Hehn; SYSTEMS RESEARCH LABS INC DAYTON OHIO
|
| An extended duration magnetohydrodynamic (MHD) generator system was developed. This system consists of the MHD combustor, nozzle, generator channel, diffuser, high speed data acquisition system and high voltage converter. Two steady-state generator channels were designed: a pegwall channel and a diagonal conducting wall channel. The pegwall channel was only constructed in a shortened version of the generator channel and was not tested for power output. The diagonal conducting wall generator ... |
|
| SOVRaD - A Digest of Recent Soviet R and D Articles. Volume 1, Numbers 5-6, May-June 1975, |
JUN 1975 |
|
| Authors:
S. Hibben; L. Boylan; J. Kourilo; B. Shresta; M. Ness; INFORMATICS INC ROCKVILLE MD
|
| This is a collection of brief abstracts on miscellaneous topics from the current Soviet technical literature. The intent is to supply a quick look at itmes of possible interest, including topics not necessarily named in the DARPA interest profile, as a supplement to our reportage on specified topics. It is intended to publish this collection on a monthly basis, to continue to provide prompt coverage of numerous aspects of Soviet ... |
|
| Investigations on the Dynamics of MHD Flows. |
15 JAN 1975 |
|
| Authors:
H. E. Wilhelm; COLORADO STATE UNIV FORT COLLINS DEPT OF ELECTRICAL ENGINEERING
|
| ;Contents: Similarity solutions for magnetogasdynamic diffuser and confuser flows with viscous, ohmic and thermal dissipation; Similarity theory for compressible gas flow in a cone with viscous and thermal dissipation; MHD stability of the flow in a cylindrical liquid metal brush; Two-component similarity theory of plasma explosions with thermal and heat flux relaxation; Nonlinear hyperbolic thermal waves in metals. |
|
Reports by Keyword(s)
MAGNETOHYDRODYNAMIC GENERATORS
