Download or read book An Analysis of Combustion in Two Dimensional and Three Dimensional Supersonic Flows written by P. I. Chushkin and published by . This book was released on 1975 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book On Two dimensional Supersonic Flows written by Stefan Bergman and published by . This book was released on 1949 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: In previous reports by the author, the method of operators has been applied to investigation of two-dimensional flow patterns of an ideal compressible fluid, mostly in the subsonic case. Using a similar approach in the present paper, the author defines two different operators which generate supersonic two-dimensional flow patterns from differentiable functions of one real variable. (An operator is any rul by means of which one function is converted into another.) Since operators of the type considered preserve many properties of the functions to which they are applied and since the theory of functions of one real variable is more extensively developed than that of solutions of the compressibility equations, the results can be used as a basis for investigation of supersonic flow patterns.

Download or read book Turbulent Boundary layer Temperature Recovery Factors in Two dimensional Supersonic Flow written by Maurice Tucker and published by . This book was released on 1951 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analytical method is presented for obtaining turbulent temperature recovery factors for a thermally insulated surface in supersonic flow. The method is an extension of Squire's analysis for incompressible flow. The boundary layer velocity profile is represented by a power law and a similarity is postulated for squared-velocity the static-temperature-difference profiles.

Download or read book Three dimensional Computations of Cross flow Injection and Combustion in a Supersonic Flow written by Mark Huitt Carpenter and published by . This book was released on 1989 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Analysis of Three dimensional Effects in Unsteady Supersonic Combustion written by M. Kallenberg and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Calculation of Three dimensional Supersonic Flows Around Spherically capped Smooth Bodies and Wings Theory and applications written by Chong-Wei Chu and published by . This book was released on 1972 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Analysis of Two and Three Dimensional Recessed Flame Holders for Scramjet Applications written by Douglas L. Davis and published by . This book was released on 1996-09-01 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigated the flame holding properties of recessed cavities in supersonic flow using numerical analysis techniques. A simplified analytical model indicated that an important property for flame holding was the lower residence time. Several chemical kinetic rate models for hydrogen and hydrocarbon combustion were compared. The perfectly stirred reactor model also indicated that trace species diffusion should increase flame spreading rate, and that heat loss reduces flame holding limits. After nonreacting calibration, two- dimensional simulations confirmed the perfectly stirred reactor results for blowout limits. Also, the effect of trace species diffusion on flame spreading was shown to be negligible, and the reduced flammability with heat loss was confirmed. Lowering the temperature of the inflow boundary layer was shown to reduce the flammability limits. Three-dimensional cavities were shown to generate axial vorticity and slightly enhance flame spreading. The methodology developed in this research provides a design guide for the size of cavity required to provide flame holding for a scramjet combustor. Also, reduction of heat losses was shown to be a method to improve flame holding performance without increasing the cavity size.

Download or read book Numerical Analysis of the Scramjet inlet Flow Field by Using Two dimensional Navier Stokes Equations written by Ajay Kumar and published by . This book was released on 1981 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Scientific and Technical Reports written by United States. National Aeronautics and Space Administration Scientific and Technical Information Division and published by . This book was released on 1965 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Technical Memorandum written by and published by . This book was released on 1994 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Two Dimensional Numerical Simulation of a Supersonic Chemically Reacting Mixing Layer written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research has been undertaken to achieve an improved understanding of physical phenomena present when a supersonic flow undergoes chemical reaction. A detailed understanding of supersonic reacting flows is necessary to successfully develop advanced propulsion systems now planned for use late in this century and beyond. In order to explore such flows, a study was begun to create appropriate physical models for describing supersonic combustion, and to develop accurate and efficient numerical techniques for solving the governing equations that result from these models. From this work, two computer programs were written to study reacting flows. Both programs were constructed to consider the multicomponent diffusion and convection of important chemical species, the finite rate reaction of these species, and the resulting interaction of the fluid mechanics and the chemistry. The first program employed a finite difference scheme for integrating the governing equations, whereas the second used a hybrid Chebyshev pseudospectral technique for improved accuracy. Drummond, J. Philip Langley Research Center BOUNDARY LAYERS; CHEMICAL REACTIONS; FLUID MECHANICS; MIXING; MIXING LAYERS (FLUIDS); NUMERICAL ANALYSIS; SIMULATION; SUPERSONIC FLOW; CHEBYSHEV APPROXIMATION; COMPUTER PROGRAMS; FINITE DIFFERENCE THEORY; HYPERSONIC AIRCRAFT; SUPERSONIC COMBUSTION RAMJET ENGINES...

Download or read book Interaction Between Two Dimensional Sonic Jets and Supersonic Flow to Model Heat Addition in a Supersonic Combustor written by John M. Traxler and published by . This book was released on 1987 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Displacement effects of heated addition to a supersonic flow through a simulated combustor were simulated with mass addition. The structure of precombustion shocks was experimentally investigated by an optical and pressure study of two parallel sonic jets expanding into a two-dimensional supersonic test cavity. Base flow and recompression shocks were studied for two test section depths. A test section to add heat to a two dimensional flow was demonstrated. It was determined that the performance of the constant-area test section was dominated by frictional, rather than shock effects. An off-design nozzle, used for preliminary investigation, caused turbulence and high losses in the channel. The structure of the precombustion zone was found to be a base flow problem and was analyzed using a simple one dimensional model. Static pressure measurements on the sidewalls of the test cavity were found to differ from the static pressure in the center of the two dimensional test cavity, due to diffusion of pressure upstream and downstream through the boundary layer. A welding torch was used to inject premixed oxygen and acetylene into the base region on the end of a centerbody between two supersonic nozzles. The flame was successfully ignited and burned continuously in the flowstream. However, the large amount of heat added caused flow separation in the supersonic nozzles.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1992 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Calculation of Three dimensional Supersonic Flows Around Spherically capped Smooth Bodies and Wings Manual for computer programs written by Chong-Wei Chu and published by . This book was released on 1972 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Turbulent Reactive Flows written by R. Borghi and published by Springer Science & Business Media. This book was released on 2013-03-08 with total page 958 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbulent reactive flows are of common occurrance in combustion engineering, chemical reactor technology and various types of engines producing power and thrust utilizing chemical and nuclear fuels. Pollutant formation and dispersion in the atmospheric environment and in rivers, lakes and ocean also involve interactions between turbulence, chemical reactivity and heat and mass transfer processes. Considerable advances have occurred over the past twenty years in the understanding, analysis, measurement, prediction and control of turbulent reactive flows. Two main contributors to such advances are improvements in instrumentation and spectacular growth in computation: hardware, sciences and skills and data processing software, each leading to developments in others. Turbulence presents several features that are situation-specific. Both for that reason and a number of others, it is yet difficult to visualize a so-called solution of the turbulence problem or even a generalized approach to the problem. It appears that recognition of patterns and structures in turbulent flow and their study based on considerations of stability, interactions, chaos and fractal character may be opening up an avenue of research that may be leading to a generalized approach to classification and analysis and, possibly, prediction of specific processes in the flowfield. Predictions for engineering use, on the other hand, can be foreseen for sometime to come to depend upon modeling of selected features of turbulence at various levels of sophistication dictated by perceived need and available capability.

Download or read book Theoretical Studies of Supersonic Two dimensional and Axisymmetric Nonequilibrium Flow Including Calculations of Flow Through a Nozzle written by James Joe Der and published by . This book was released on 1963 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical and vibrational nonequilibrium phenomena in steady inviscid flow fields are studied by the analysis of flow past curved boundaries. Possible alternative choices of the state variables to be used are considered. General features of the nonequilibrium flow are studied by examination of the mathematical properties of the nonlinear flow equations. An axisymmetric nonequilibrium flow of air through a supersonic nozzle is analyzed by means of numerical computations. The coupling effects between nonuniformity (across a nozzle section) and nonequilibrium, not taken into account in the quasi-one-dimensional flow approximation, are revealed by the present analysis.