336
336
Jun 1, 2011
06/11
by
Geisenheyner, Robert M.; Berdysz, Joseph J
texts
eye 336
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Performance properties and operational characteristics of an axial-flow gas turbine-propeller engine were determined. Data are presented for a range of simulated altitudes from 5,000 to 35,0000 feet, compressor inlet- ram pressure ratios from 1.00 to 1.17, and engine speeds from 8000 to 13,000 rpm.
Topics: LAMINAR BOUNDARY LAYER, THREE DIMENSIONAL FLOW, VELOCITY, MATHEMATICAL MODELS
751
751
May 6, 2010
05/10
by
Mager, A
texts
eye 751
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comment 0
No Abstract Available
Topics: BOUNDARY LAYERS, NAVIER-STOKES EQUATION, ROTATION, THREE DIMENSIONAL FLOW
326
326
Jun 19, 2010
06/10
by
Babenko, K. I.; Rusanov, V. V
texts
eye 326
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Differential calculations for three-dimensional supersonic gas flow around smooth body
Topics: DIFFERENTIAL CALCULUS, THREE-DIMENSIONAL FLOW, GAS DYNAMICS, GAS FLOW, MATRICES (MATHEMATICS),...
442
442
Jul 5, 2010
07/10
by
Laugwitz, D.; Schmieden, C
texts
eye 442
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comment 0
No Abstract Available
Topics: LINEAR EQUATIONS, SUPERSONIC FLOW, WINGS, PROBLEM SOLVING, THREE DIMENSIONAL FLOW
348
348
Jul 11, 2010
07/10
by
English, R. E
texts
eye 348
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The present state of the art of thermal power systems is surveyed. Because of the great potential variety of thermal power systems, the heat sources, the power conversion systems, and the integration of thermal power systems with missions are treated sequentially.
Topics: CONCAVITY, LAMINAR BOUNDARY LAYER, THREE DIMENSIONAL FLOW, EIGENVALUES, TURBULENT FLOW, VORTICES
194
194
Jun 18, 2010
06/10
by
Chushkin, P. I.; Katskova, O. N
texts
eye 194
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Three-dimensional supersonic flow of gas in thermodynamic equilibrium around body at angle of attack
Topics: ANGLE OF ATTACK, GAS FLOW, SUPERSONIC FLOW, THERMODYNAMIC EQUILIBRIUM, THREE-DIMENSIONAL FLOW,...
2,729
2.7K
Jun 18, 2010
06/10
by
Babenko, K. I.; Lyubimov, A. N.; Rusanov, V. V.; Voskresenskiy, G. P
texts
eye 2,729
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Nonaxisymmetric three-dimensional flow field of ideal gas about smooth body of revolution
Topics: AXISYMMETRIC FLOW, BODY OF REVOLUTION, FLOW FIELD, IDEAL GAS, THREE-DIMENSIONAL FLOW, BODIES OF...
580
580
Jun 9, 2011
06/11
by
Zang, Thomas A.; Green, Lawrence L
texts
eye 580
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A challenge for the fluid dynamics community is to adapt to and exploit the trend towards greater multidisciplinary focus in research and technology. The past decade has witnessed substantial growth in the research field of Multidisciplinary Design Optimization (MDO). MDO is a methodology for the design of complex engineering systems and subsystems that coherently exploits the synergism of mutually interacting phenomena. As evidenced by the papers, which appear in the biannual...
Topics: COMPUTATIONAL GRIDS, THREE DIMENSIONAL FLOW, UNSTRUCTURED GRIDS (MATHEMATICS), VORTICES,...
261
261
Jun 21, 2010
06/10
by
Vango, S. P
texts
eye 261
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Sampling and analytical procedure for nitrogen tetroxide and mixed oxides of nitrogen
Topics: ABLATIVE NOSE CONES, THREE DIMENSIONAL FLOW, TURBULENT BOUNDARY LAYER, CONFERENCES, POLYMETHYL...
505
505
May 27, 2011
05/11
by
Carter, Thomas L
texts
eye 505
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A series of investigations using the fatigue spin rig to study the effect of several factors contributing to rolling contact fatigue life is summarized. Ball specimens of 1/2 and 9/16 inch diameter were tested at maximum theoretical Hertz compressive stresses in the range of 600,000 to 750,000 psi. Life was found to vary inversely with the tenth power of stress. In forging fiber studies, a greater concentration of failures and poorer life were observed where the greatest angle of intersection...
Topics: THREE DIMENSIONAL FLOW, SUPERSONIC WIND TUNNELS, MACH NUMBER, CONICAL FLOW, TEST CHAMBERS, WALLS
219
219
Jun 21, 2010
06/10
by
Levin, B. YU
texts
eye 219
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comment 0
Unsolved problems of planetary origins
Topics: GAS FLOW, QUANTITATIVE ANALYSIS, THREE DIMENSIONAL FLOW, COORDINATES, FLOW CHARACTERISTICS, FLOW...
257
257
Jul 23, 2010
07/10
by
Sarthou, CH
texts
eye 257
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comment 0
No Abstract Available
Topics: AXISYMMETRIC FLOW, GAS DYNAMICS, STEADY STATE, TWO DIMENSIONAL FLOW, REPORTS, THREE DIMENSIONAL...
Topics: DTIC Archive, CHEMICAL CORPS ARMY CHEMICAL CENTER MD, *CHEMICAL ORDNANCE, BIOLOGY, THREE...
The objective of this project is to improve understanding of shallow estuarine flows and sediment transport by collecting and analyzing measurements of three-dimensional flow structure in tidal channels and adjacent tidal flats.
Topics: DTIC Archive, WASHINGTON STATE UNIV VANCOUVER, *THREE DIMENSIONAL FLOW, *SEDIMENT TRANSPORT,...
The overall goal of this program was to develop a large area updateable 3D color display using unique and innovative photorefractive (PR) polymers with fast writing times (ms), long persistence (hours) and rapid erasure (several seconds). A multi-pronged approach was used to integrate the presently established materials, find new photorefractive materials, and electronics and photonics techniques to achieve the following goals: - 3D display devices: we developed large area PR polymer devices...
Topics: DTIC Archive, TIPD LLC TUCSON AZ, *HOLOGRAPHY, *PHOTOREFRACTIVE MATERIALS, COLOR PHOTOGRAPHY,...
439
439
Jul 11, 2010
07/10
by
Histand, M. B.; Miller, C. W.; Wells, M. K.; Mcleod, F. D.; Greene, E. R.; Winter, D
texts
eye 439
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A transcutanous method to measure instantaneous mean blood flow in peripheral arteries of the human body was defined. Transcutanous and implanted cuff ultrasound velocity measurements were evaluated, and the accuracies of velocity, flow, and diameter measurements were assessed for steady flow. Performance criteria were established for the pulsed Doppler velocity meter (PUDVM), and performance tests were conducted. Several improvements are suggested.
Topics: FLOW DISTRIBUTION, LASER DOPPLER VELOCIMETERS, PARTICLES, TRANSONIC COMPRESSORS, COMPRESSOR ROTORS,...
238
238
Jul 6, 2010
07/10
by
Dmitriyev, M. T
texts
eye 238
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Detailed descriptions are given of observations of ball lightning. The possible sources of energy for ball lightning are discussed. These are self-sustaining chemical reactions of the direct oxidation of nitrogen, the nuclear reaction of atmospheric xenon, and the annihilation of matter with antimatter. No definite conclusions are reached.
Topics: AERODYNAMIC STALLING, AXIAL FLOW, CASCADE FLOW, FLOW CHARACTERISTICS, TURBOCOMPRESSORS, BOUNDARY...
224
224
May 31, 2011
05/11
by
Camarotte, C.; Lancaster, G. S.; Eichenberg, D.; Butler, S. M.; Miller, J. R
texts
eye 224
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Recent improvements in energy densities of batteries open the possibility of using electric rather that hydraulic actuators in space vehicle systems. However, the systems usually require short-duration, high-power pulses. This power profile requires the battery system to be sized to meet the power requirements rather than stored energy requirements, often resulting in a large and inefficient energy storage system. Similar transient power applications have used a combination of two or more...
Topics: CARTESIAN COORDINATES, GRID GENERATION (MATHEMATICS), THREE DIMENSIONAL FLOW, BOUNDARY CONDITIONS,...
228
228
Jul 5, 2010
07/10
by
Boksembom, A. S.; Moore, B. J
texts
eye 228
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comment 0
No Abstract Available
Topics: NOSES (FOREBODIES), SHOCK ABSORBERS, SUPERSONIC SPEED, WIND TUNNEL MODELS, GRAPHS (CHARTS), THREE...
243
243
Jul 5, 2010
07/10
by
Conrad, H. M
texts
eye 243
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The experimental program was designed to: (1) relate the anticipated response to metabolic and energetic reactions throughout the length of roots and shoots; (2) determine whether changes in metabolism which occur on the clinostat would also be found in space-grown seedlings; and (3) compare the biochemistry of epinastic curvature with that of geotropic curvatures. The activity of key enzymes associated with some of the pathways of intermediary metabolism and energetics was measured. The...
Topics: BOUNDARY LAYER FLOW, COMPRESSIBLE FLOW, FLOW EQUATIONS, THREE DIMENSIONAL FLOW, APPLICATIONS OF...
Autosomal Dominant Polycystic Kidney Disease (ADPKD) is a hereditary disorder associated with a mutation of either PKDJ or PKD2. The pathophysiological mechanisms of ADPKD which ultimately result in the formation of bilateral focal cysts are not well understood. Specifically, the early disease pathways associated with the transition for a tubule to cystic phenotype are not well understood and consequently no targeted treatments for ADPKD exist The purpose of this project is to develop and...
Topics: DTIC Archive, Kaplan,David L, Tuffs University Medford United States, DISEASES AND DISORDERS,...
349
349
May 23, 2011
05/11
by
Fricke, Robert W., Jr
texts
eye 349
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STS-79 was the fourth of nine planned missions to the Russian Mir Space Station. This report summarizes the activities such as rendezvous and docking and spaceborne experiment operations. The report also discusses the Orbiter, External Tank (ET), Solid Rocket Boosters (SRB), Reusable Solid Rocket Motor (RSRM) and the space shuttle main engine (SSME) systems performance during the flight. The primary objectives of this flight were to rendezvous and dock with the Mir Space Station and exchange a...
Topics: ALGORITHMS, STRUCTURED GRIDS (MATHEMATICS), GRID GENERATION (MATHEMATICS), ERROR ANALYSIS, THREE...
In this research perturbations are placed at a variety of spatial locations and their progression in time is tracked together with side force values to link the disturbance of particular regions to the growth of asymmetry. The results of this research provide further evidence that the primary vortex/saddle point region is critical to the formation of vortex asymmetry in conical Navier-Stokes equation set simulation. In addition, the proper technique for tracking the perturbations is explained....
Topics: DTIC Archive, Godavarty, Dinesh, CINCINNATI UNIV OH, *FLOW FIELDS, VORTICES, ASYMMETRY,...
337
337
Jun 11, 2011
06/11
by
Meyers, James F
texts
eye 337
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The development of Doppler global velocimetry is described. Emphasis is placed on the modifications necessary to advance this nonintrusive laser based measurement technique from a laboratory prototype to a viable wind tunnel flow diagnostics tool. Several example wind tunnel flow field investigations are described to illustrate the versatility of the technique. Flow conditions ranged from incompressible to Mach 2.8 with measurement distances extending from 1 to 15 m.
Topics: THREE DIMENSIONAL FLOW, NAVIER-STOKES EQUATION, NUMERICAL ANALYSIS, INCOMPRESSIBLE FLOW, INVISCID...
357
357
Jul 26, 2010
07/10
by
Beckwith, Ivan E.; Chen, Fang-Jeng; Malik, Mujeeb R
texts
eye 357
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A schematic diagram of the new proposed Supersonic Low Disturbance Tunnel (SLDT) is shown. Large width two dimensional rapid expansion nozzles guarantee wide quiet test cores that are well suited for testing models at large angle of attack and for swept wings. Hence, this type of nozzle will be operated first in the new proposed large scale SLDT. Test results indicate that the surface finish of pilot nozzles is critical. The local roughness Reynolds number criteria R sub k is approx. = 10 will...
Topics: BOUNDARY LAYER SEPARATION, COMPUTATIONAL FLUID DYNAMICS, COMPUTERIZED SIMULATION, FINS, SHOCK...
622
622
Jul 11, 2010
07/10
by
VOYTOVICH, L. N.; GINEVSKIY, A. S
texts
eye 622
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THE INFLUENCE OF LARGE LONGITUDINAL PRESSURE GRADIENTS GENERATED BY CONTRACTING NOZZLES ON THE EQUILIZATION OF THE VELOCITY AND PRESSURE FIELDS, ON THE DAMPING OF TURBULENT VELOCITY PULSATIONS, AND ON THE INITIAL DISTURBANCES IN THE FLOW IS STUDIED EXPERIMENTALLY. IT IS SHOWN THAT WITH INCREASING DEGREE OF NOZZLE CONTRACTION, THE DEGREE OF TURBULENCE AT THE NOZZLE EXIT SECTION DECREASES, HOWEVER, THE LONGITUDINAL AND TRANSVERSE COMPONENTS OF THE VELOCITY PULSATIONS INCREASE REGARDLESS OF...
Topics: BUFFETING, SUBSONIC SPEED, SWEPT WINGS, TRANSONIC SPEED, TRANSPORT AIRCRAFT, AERODYNAMIC...
Smoothed Particle Hydrodynamics (SPH), a meshless Lagrangian numerical method, is used to examine the complicated three-dimensional flow field in breaking waves. SPH has an advantage over other computational methods to examine this problem as it allows for vorticity and splashing of the fluid. Here we are addressing the important issue of the source of vorticity in waves as they propagate and break in very shallow water, and we are discovering the mechanisms for breaking wave turbulence in the...
Topics: DTIC Archive, JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF CIVIL ENGINEERING, *HYDRODYNAMICS, LAGRANGIAN...
119
119
Jul 25, 2010
07/10
by
Scott, Stan G.; Bui, T. Paul; Chan, K. Roland; Bowen, Stuart W
texts
eye 119
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A Meteorological Measurement System (MMS) was designed for the high-altitude ER-2 aircraft (NASA 706). Through dedicated instrumentation installed on the aircraft and repeated calibrations, the MMS provides accurate in situ measurements of free-stream pressure, temperature, and the wind vector. The MMS has participated in two major high-altitude scientific expeditions, the Stratosphere-Troposphere Exchange Project (STEP) based in northern Australia and the Airborne Antarctic Ozone Experiment...
Topics: SIMULATION, ROTORS, VANES, THREE DIMENSIONAL FLOW, TURBOCOMPRESSORS, TURBOMACHINERY, VISCOUS FLOW,...
548
548
Jul 11, 2010
07/10
by
Trexler, D. T
texts
eye 548
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The author has identified the following significant results. Working from the S190A photography at a scale of 1:702,000 and comparing the results with existing geologic maps has suggested that the larger scale structural features can be mapped and related to regional trends which provide an overall view not available at lower altitudes. All S190B in-house coverage was in stereo. The stereo capability was helpful in resolving problems relating to elevations and attitude of bedding, etc., but the...
Topics: SPOILERS, TRANSPORT AIRCRAFT, VORTEX BREAKDOWN, WIND TUNNEL TESTS, TRAILING EDGE FLAPS, AERODYNAMIC...
405
405
May 24, 2011
05/11
by
Steffen, K.; Thomas, R.; Weaver, R.; Welch, R; Bindschadler, R.; Casassa, G.; Comiso, J.; Eppler, D.; Fetterer, F.; Hawkins, J.; Key, J.; Rothrock, D.
texts
eye 405
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The third symposium on Remote Sensing of Snow and Ice, organized by the International Glaciological Society, took place in Boulder, Colorado, 17-22 May 1992. As part of this meeting a total of 21 papers was presented on snow and ice applications of Advanced Very High Resolution Radiometer (AVHRR) satellite data in polar regions. Also during this meeting a NASA sponsored Workshop was held to review the status of polar surface measurements from AVHRR. In the following we have summarized the ideas...
Topics: AGGLOMERATION, ANISOTROPY, ALGORITHMS, MULTIGRID METHODS, HIGH REYNOLDS NUMBER, VISCOUS FLOW,...
240
240
Jul 11, 2010
07/10
by
Gazenko, O. G
texts
eye 240
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comment 0
Academician O. Gazenko, Chief of the Institute of Biomedical Problems, USSR Ministry of Public Health, reviewed the short but intense history of Soviet research in space biology and medicine. The solid academic approach of the Soviet Academy of Sciences in giving a good start at the very beginning of the space age is stressed and key people and institutions who initiated these studies are named. The basic feature of the first period of space biology is seen as the search for answers to a few...
Topics: COMPUTER PROGRAMS, GEOMETRY, INPUT/OUTPUT ROUTINES, THREE DIMENSIONAL FLOW, AERODYNAMIC...
240
240
Jun 2, 2011
06/11
by
Stone, Lee; Buetter, Brent; Lorenceau, Jean; Masson, Guillaume; Mestre, Danie
texts
eye 240
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comment 0
Much has been learned about the human ability to detect and discriminate information within local patches of image motion, and a model consisting of motion-energy detectors i s a good descriptor of human low-level motion detection. This simple quasilinear view, however, does not adequately describe human performance in motion tasks that require either global integration across the image or segmentation of multiple overlapping independent motions presented simultaneously, yet these two abilities...
Topics: SKIN FRICTION, FRICTION MEASUREMENT, THREE DIMENSIONAL FLOW, SHEAR STRESS, WIND TUNNEL TESTS, FLUID...
268
268
Jun 21, 2010
06/10
by
Camacho, S. L
texts
eye 268
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comment 0
Spark gap type protective circuit for fast sensing and removal of overvoltage conditions
Topics: BODIES OF REVOLUTION, METHOD OF CHARACTERISTICS, SUPERSONIC FLOW, THREE DIMENSIONAL FLOW,...
174
174
Jun 12, 2011
06/11
by
Palumbo, Dan; Chabalko, Chri
texts
eye 174
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Persistent structures in the turbulent boundary layer are located and analyzed. The data are taken from flight experiments on large commercial aircraft. An interval correlation technique is introduced which is able to locate the structures. The Morlet continuous wavelet is shown to not only locates persistent structures but has the added benefit that the pressure data are decomposed in time and frequency. To better understand how power is apportioned among these structures, a discrete Coiflet...
Topics: THREE DIMENSIONAL FLOW, SIMULATION, EIGENVALUES, JET FLOW, MATHEMATICAL MODELS, ASPECT RATIO,...
Topological concepts are used to derive separation conditions for two- and three-dimensional laminar flows. The result for two-dimensional flow reproduces the form of the well-known Stratford criterion. An extension makes the form applicable to the symmetry plane of a three-dimensional flow.
Topics: NASA Technical Reports Server (NTRS), THREE DIMENSIONAL FLOW, TWO DIMENSIONAL FLOW, LAMINAR FLOW,...
304
304
Jul 12, 2010
07/10
by
Claus, R. W
texts
eye 304
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A series of progressively finer grid systems to calculate the single jet in cross-flow experimentally measured were employed. The experimental measurements provide a collection of velocities, turbulence intensities, and jet concentration profiles with measurements of the inlet field. The use of a series of progressively finer grid systems allows a differentiation between numerical errors and the hydrodynamic modeling assumptions embodied in the 3D combustor code.
Topics: EXHAUST NOZZLES, THRUST REVERSAL, THRUST VECTOR CONTROL, TURBOJET ENGINES, COOLING, LEAKAGE, NOZZLE...
180
180
Jul 10, 2010
07/10
by
PIEUCHARD, G.; FLAMAND, J
texts
eye 180
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AN EXPERIMENTAL STUDY, GUIDED BY THEORETICAL CONSIDERATIONS, WAS MADE TO INCREASE THE EFFICIENCY OF HOLOGRAPHIC GRATINGS. IT WAS POSSIBLE TO ACHIEVE AN EFFICIENCY OF 33% USING A GRATING WITH 3,600 LINES WITH THE LY ALPHA LINE. IN ADDITION, FLAT GRATINGS WITH 6,000 LINES PER MM AND CONCAVE GRATINGS 300 MM IN DIAMETER WITH 1,200 LINES PER MM WERE MADE.
Topics: COMPUTER PROGRAMS, INCOMPRESSIBLE FLUIDS, THREE DIMENSIONAL FLOW, TURBULENCE MODELS, TURBULENT...
246
246
Jul 25, 2010
07/10
by
Green, James R
texts
eye 246
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The Ada programming language was developed under the sponsorship of the Department of Defense to address the soaring costs associated with software development and maintenance. Ada is powerful, and yet to take full advantage of its power, it is sufficiently complex and different from current programming approaches that there is considerable risk associated with committing a program to be done in Ada. There are also few programs of any substantial size that have been implemented using Ada that...
Topics: FLUID DYNAMICS, WALLS, GAS FLOW, HIGH TEMPERATURE GASES, MANIFOLDS, SPACE SHUTTLE MAIN ENGINE,...
291
291
May 30, 2011
05/11
by
Newcomer, Jeffrey A.; Dominguez, Roseann
texts
eye 291
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The level-0 Daedalus Thematic Mapper Simulator (TMS) imagery, along with the other remotely sensed images, was collected to provide spatially extensive information about radiant energy over the primary BOReal Ecosystem-Atmosphere Study (BOREAS) study areas. This information includes detailed land cover and biophysical parameter maps such as fraction of Photosynthetically Active Radiation (fPAR) and Leaf Area Index (LAI). Two flights of the Daedalus TMS instrument were made onboard the ER-2...
Topics: DIMENSIONAL ANALYSIS, GRAPHICAL USER INTERFACE, THREE DIMENSIONAL FLOW, UNSTEADY FLOW, VISCOUS...
Because of the long and narrow passages between the blades of a rocket pump inducer, major effects from turbulence and viscosity make the flow through such a device truly three-dimensional and therefore difficult to measure or predict. To investigate the flow characteristics, conventional and three-dimensional hot-wire probe measurements were conducted in a model inducer 3 ft in diameter. Blade-to-blade variation of the three components of velocity at the exit and the corresponding turbulence...
Topics: NASA Technical Reports Server (NTRS), INTAKE SYSTEMS, THREE DIMENSIONAL FLOW, TURBINE PUMPS, FLOW...
379
379
Jul 11, 2010
07/10
by
JOHANSSON, M
texts
eye 379
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THE ECONOMIC, ENERGY-ECONOMIC, AND ENVIRONMENTAL ISSUES INVOLVED IN ANY PROSPECTIVE EXPLOITATION OF WIND POWER INTENDED TO COVER A MINOR PART (10%) OF DENMARK'S CONSUMPTION OF ELECTRICITY ARE DISCUSSED. THE CHIEF BASIS FOR THE CALCULATIONS INVOLVED IS THE 200 KW EXPERIMENTAL WINDMILL BUILT AT GEDSER IN 1956-57, WHICH CEASED TO PRODUCE ELECTRICITY IN 1967. HOWEVER, IN EXPLORING THE RAMIFICATIONS OF MAKING DENMARK PARTIALLY DEPENDENT ON WIND ENERGY POWER, ESTIMATES ARE MADE ON THE BASIS OF...
Topics: CHANNEL FLOW, FLUID FLOW, HYDRODYNAMIC EQUATIONS, THREE DIMENSIONAL FLOW, VELOCITY DISTRIBUTION,...
A procedure was developed for the design of transonic wings by the iterative use of three dimensional, inviscid, transonic analysis methods. The procedure was based on simple principles of supersonic flow and provided the designer with a set of guidelines for the systematic alteration of wing profile shapes to achieve some desired pressure distribution. The method was generally applicable to wing design at conditions involving a large region of supercriterical flow. To illustrate the method, it...
Topics: NASA Technical Reports Server (NTRS), SUPERCRITICAL WINGS, THREE DIMENSIONAL FLOW, TRANSONIC FLOW,...
This report describes the first study leading to the application of Particle Image Velocimetry to diagnose rotor type flows in the NASA Ames 80x120-foot wind tunnel facility. The necessary steps towards the implementation of PIV to study rotor type flows were first investigated in the Army Rotor Hover Chamber. The model problem consisted of the three-dimensional flow generated by a two-blade rotor at different wake ages.
Topics: NASA Technical Reports Server (NTRS), WIND TUNNELS, PARTICLE IMAGE VELOCIMETRY, FLOW MEASUREMENT,...
515
515
Jul 11, 2010
07/10
by
Stricklin, J. A.; Haisler, W. E
texts
eye 515
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comment 0
No Abstract Available
Topics: BOUNDARY LAYER SEPARATION, INCOMPRESSIBLE FLOW, PREDICTION ANALYSIS TECHNIQUES, THIN WINGS, THREE...
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251
Jun 11, 2011
06/11
by
Connerney, J. E. P.; Acuna, M. H.; Ness, N. F.; Mitchell, D. L.; Lin, R. P.; Reme, H
texts
eye 251
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The Mars Global Surveyor spacecraft has completed two Mars years in nearly circular polar orbit at a nominal altitude of 400 km. The Mars crust is at least an order of magnitude more intensely magnetized than that of the Earth, and intriguing in both its global distribution and geometric properties. Measurements of the vector magnetic field have been used to map the magnetic field of crustal origin to high accuracy. This most recent map is assembled from 2 full years of MGS night-side...
Topics: SEALS (STOPPERS), THREE DIMENSIONAL FLOW, COMPUTATIONAL FLUID DYNAMICS, FLOW DISTRIBUTION, AIR...
A computer program for determining the theoretical performance of a three dimensional inlet is presented. An analysis for determining the capture area, ram force, spillage force, and surface pressure force is presented, along with the necessary computer program. A sample calculation is also included.
Topics: NASA Technical Reports Server (NTRS), COMPUTER PROGRAMS, INTAKE SYSTEMS, THREE DIMENSIONAL FLOW,...
A general theory of steady three-dimensional flow of a nonviscous fluid in subsonic and supersonic turbomachines having arbitrary hub and casing shapes and a finite number of blades is presented, The solution of the three-dimensional direct and inverse problem is obtained by investigating an appropriate combination of flows on relative stream surfaces whose intersections with a z-plane either upstream of or some- where inside the blade row form a circular arc or a radial line. The equations...
Topics: DTIC Archive, Wu, Chung-Hua, NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON DC, *THREE...
877
877
Jul 11, 2010
07/10
by
NON
texts
eye 877
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comment 0
No Abstract Available
Topics: DELTA WINGS, VORTEX SHEETS, FLOW GEOMETRY, STEADY FLOW, THREE DIMENSIONAL FLOW, UNSTEADY FLOW,...
185
185
Jun 21, 2010
06/10
by
Stepanova, S. I
texts
eye 185
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comment 0
Labyrinths effect on cervical muscle tonus
Topics: SOLID PROPELLANT ROCKET ENGINES, STRESS ANALYSIS, VISCOELASTICITY, COMPUTER PROGRAMS, POISSON...
An absolute scalar pseudo-viscosity (q) expression for handling shocks automatically in numerical calculations of three-dimensional fluid dynamics problems is derived. The expression is a generalization of that derived by von Neumann and Richtmyer in the sense that the expressions are identical for a plane shock wave. The basic assumption made is that a shock will be formed in a material when there is compression in the direction of acceleration; this assumption seems reasonable physically,...
Topics: DTIC Archive, Richards, Gerald T, CALIFORNIA UNIV LIVERMORE RADIATION LAB, *NUMERICAL ANALYSIS,...