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Author : Kenneth Edmund Kasza
Publisher :
ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.:/5 (928 download)
Download or read book The Viscous Interaction Within the Hypersonic Rarefied Gas Flow Regime written by Kenneth Edmund Kasza and published by . This book was released on 1972 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Roger M. Winebarger
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (31 download)
Download or read book Experimental Study of the Shock Wave Due to a Blunt Leading Edge in the Hypersonic Merged-flow Regime written by Roger M. Winebarger and published by . This book was released on 1970 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christopher E. Glass
Publisher :
ISBN 13 :
Total Pages : 224 pages
Book Rating : 4.:/5 (317 download)
Download or read book Numerical Study of Rarefied Hypersonic Flow Interacting with a Continuum Jet written by Christopher E. Glass and published by . This book was released on 2000 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: An uncoupled CFD-DSMC technique is developed and applied to provide solutions for continuum jets interacting with rarefield external flows. The technique is based on a correlation of the appropriate Bird breakdown parameter for a transitional-rarefield condition that defines a surface within which the continuum solution is unaffected by the external flow-jet interaction. The method is applied to two problems to assess and demonstrate its validity: one of a jet interaction in the transitional-rarefied flow regime and the other in the moderately rarefield regime. Results show that the appropriate Bird breakdown surface for uncoupling the continuum and non-continuum solutions is a function of a non-dimensional parameter relating the momentum flux and collisionality between the two interacting flows.
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (946 download)
Download or read book Simulations of Hypersonic Rarefied Gas Flows Using DSMC-MLG. written by and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The combined Direct Simulation Monte Carlo (DSMC) and Monotonic Lagrangian Grid (MLG) methodologies are used on the massively parallel Connection Machines CM-5 to solve for the properties of a low density hypersonic flow through a channel containing a wedge. Numerical issues related to grid generation around the obstacle, the effects of resolution in terms of the simulated to actual particle ratio, and the use of time-averaging to obtain a statistically converged solution are discussed. A method is presented for quantifying the effects of the grid on the solution. The flow field shows many important aerodynamic features, such as shock waves, boundary layers, expansion fan, and their interactions. Since the flow is so rarefied, these structures are diffuse compared to what is expected in a continuum flow. For example, the reattachment shock behind the trailing edge of the wedge degenerates into a diffuse viscous layer. Other low density effects include the velocity slip, which peaks near the leading edges where the density is low, and temperature jump of the gas adjacent to the solid surfaces, which is highest at the entrance of the channel and decreases further downstream. The calculated skin friction and heat transfer agree well with the Reynolds analogy for boundary layer flow. The computed pressure distributions along the wall are consistent with hypersonic viscous theory and other DSMC calculations.
Author : William H. Dorrance
Publisher : Courier Dover Publications
ISBN 13 : 0486822583
Total Pages : 353 pages
Book Rating : 4.4/5 (868 download)
Download or read book Viscous Hypersonic Flow written by William H. Dorrance and published by Courier Dover Publications. This book was released on 2017-05-22 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed for advanced undergraduate and graduate courses in modern boundary-layer theory, this frequently cited work offers a self-contained treatment of theories for treating laminar and turbulent boundary layers of reacting gas mixtures. 1962 edition.
Author : V. S. Galkin
Publisher :
ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (227 download)
Download or read book Investigation of a Hypersonic Flow of Slightly Rarefied Viscous Gas Around a Flat Plate written by V. S. Galkin and published by . This book was released on 1963 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calculation of drag coefficient of a flat semi-infinite heat-insulated plate in a hypersonic gas flow with slip is described. It is assumed that the region of flow between joined strong jumps of the packing and the plate consists of a non-viscous zone and laminar boundary layer. The strong interaction of the jump with the layer is considered. In calculation of the boundary layer the integral form of equation of pulses with linear profile of speed is used and taking into account the speed of slip. Parameters of flow on the external boundary of the boundary layer are calculated by the method of tangential wedges.
Author : John Webster Ellinwood
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.3/5 (91 download)
Download or read book Axisymmetric Hypersonic Flow with Strong Viscous Interaction written by John Webster Ellinwood and published by . This book was released on 1967 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stewartson's theory for axisymmetric hypersonic flow of a model gas with strong viscous interaction and strong shock wave is extended to power-law viscosity variation, nonunit Prandtl number, and body shapes other than power laws. For power-law bodies, the generalized theory is obtained in closed form without recourse to numerical integration. In addition, numerical computations are presented for axisymmetric flow over a three-quarter power-law body with strong shock wave and viscous interactions that range from weak to strong. (Author).
Author : National Aeronaut Administration (Nasa)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722689681
Total Pages : 54 pages
Book Rating : 4.6/5 (896 download)
Download or read book Perspectives on Hypersonic Viscous and Nonequilibrium Flow Research written by National Aeronaut Administration (Nasa) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-10 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: An attempt is made to reflect on current focuses in certain areas of hypersonic flow research by examining recent works and their issues. Aspects of viscous interaction, flow instability, and nonequilibrium aerothermodynamics pertaining to theoretical interest are focused upon. The field is a diverse one, and many exciting works may have either escaped the writer's notice or been abandoned for the sake of space. Students of hypersonic viscous flow must face the transition problems towards the two opposite ends of the Reynolds or Knudsen number range, which represents two regimes where unresolved fluid/gas dynamic problems abound. Central to the hypersonic flow studies is high-temperature physical gas dynamics; here, a number of issues on modelling the intermolecular potentials and inelastic collisions remain the obstacles to quantitative predictions. Research in combustion and scramjet propulsion will certainly be benefitted by advances in turbulent mixing and new computational fluid dynamics (CFD) strategies on multi-scaled complex reactions. Even for the sake of theoretical development, the lack of pertinent experimental data in the right energy and density ranges is believed to be among the major obstacles to progress in aerothermodynamic research for hypersonic flight. To enable laboratory simulation of nonequilibrium effects anticipated for transatmospheric flight, facilities capable of generating high enthalpy flow at density levels higher than in existing laboratories are needed (Hornung 1988). A new free-piston shock tunnel capable of realizing a test-section stagnation temperature of 10(exp 5) at Reynolds number 50 x 10(exp 6)/cm is being completed and preliminary tests has begun (H. Hornung et al. 1992). Another laboratory study worthy of note as well as theoretical support is the nonequilibrium flow experiment of iodine vapor which has low activation energies for vibrational excitation and dissociation, and can be studied in a laboratory with modest resou...
Author : Bernie D. Shizgal
Publisher : AIAA
ISBN 13 : 9781600864131
Total Pages : 580 pages
Book Rating : 4.8/5 (641 download)
Download or read book Rarefied Gas Dynamics written by Bernie D. Shizgal and published by AIAA. This book was released on 1994 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert J. Cresci
Publisher :
ISBN 13 :
Total Pages : 27 pages
Book Rating : 4.:/5 (227 download)
Download or read book Viscous and Inviscid Interactions in the Hypersonic Flow Regime written by Robert J. Cresci and published by . This book was released on 1978 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ronald F. Probstein
Publisher :
ISBN 13 :
Total Pages : 65 pages
Book Rating : 4.:/5 (156 download)
Download or read book Viscous Aerodynamic Characteristics in Hypersonic Rarefied Gas Flow written by Ronald F. Probstein and published by . This book was released on 1959 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 1572 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Timothy J. Bartel
Publisher : American Institute of Physics
ISBN 13 :
Total Pages : 1004 pages
Book Rating : 4.:/5 (318 download)
Download or read book Rarefied Gas Dynamics written by Timothy J. Bartel and published by American Institute of Physics. This book was released on 2001-10-05 with total page 1004 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is concerned with the properties and flows of rarefied gases and with the interactions of these gases with solid surfaces and force fields. Topics include: low density aerodynamics, jets, plumes, and propulsion clusters, aerosols, and internal flows and vacuum systems.
Author : A. A. Agbormbai
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Gas Surface Interaction Rates in Rarefied Hypersonic Flows written by A. A. Agbormbai and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : O.M. Belotserkovskii
Publisher : Springer
ISBN 13 :
Total Pages : 728 pages
Book Rating : 4.F/5 ( download)
Download or read book Rarefied Gas Dynamics written by O.M. Belotserkovskii and published by Springer. This book was released on 1985 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Datta V. Gaitonde
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.3/5 (91 download)
Download or read book Computation of Viscous Shock/shock Hypersonic Interactions with an Implicit Flux Split Scheme written by Datta V. Gaitonde and published by . This book was released on 1990 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The interaction of an impinging shock with the bow-shock generated by a blunt geometry is examined numerically for hypersonic (Mach 8, perfect gas) flows with modified Steger-Warming flux-split scheme. The modifications are designed to reduce numerical dissipation in the boundary layer thus improving the resolution and accuracy of the resulting algorithm. The full 2-D Navier- Stokes equations are solved in finite-volume formulation with central differencing for viscous terms and residual driven line Gauss-Seidel relaxation for time advancement. Grid resolution studies are performed. For a Type IV interaction, comparison with surface pressure and heat-transfer rates display good overall agreement with experimental values. For a Type III+ interaction, a detailed comparison is made with experimental surface quantities and a computation with Van Leer's flux-splitting algorithm. The peak amplification of pressure is modestly overpredicted with the current algorithm. The computed peak heat transfer is comparable to that obtained in previous research with Van Leer's splitting, although anomalous behavior is observed in the vicinity of the stagnation point. This behavior may be eliminated with appropriate corrections.
Author : W. J. McCroskey
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (227 download)
Download or read book An Experimental Model for the Sharp Leading Edge Problem in Rarefied Hypersonic Flow written by W. J. McCroskey and published by . This book was released on 1966 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow field studies of the shock wave and boundary layer development on a sharp flat plate are presented for a region of rarefied flow that bridges the gap between a classical hypersonic boundary layer downstream and a kinetic flow model at the leading edge. The measurements give a comprehensive picture of the flow pattern in the 'merged layer' or 'viscous layer' regime, which exists upstream of the region of validity of hypersonic viscous interaction theory. The results are derived from a combination of several probing and optical techniques and surface pressure measurements. From the detailed measurements, a true scale physical model of the flow field is constructed for the merged layer regime. One of the main features of the model is a thick, curved shock wave which decreases in strength as the leading edge is approached, even though the shock angle increases. Density profiles across the shock and viscous layers show that the structure of the flow field is quite different from the classical picture of a hypersonic boundary layer beneath an oblique Rankine-Hugonio shock wave. (Author).
