Download or read book Numerical Analysis of Flow Through Scramjet Engine Inlets written by Ajay Kumar and published by . This book was released on 1987 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: A set of computer programs has been developed to analyze flow through supersonic combustion ramjet (scramjet) inlets. These programs solve either the two- or three-dimensional Euler/Navier-Stokes equations in full conversation form by MacCormack's explicit or explicit-implicit method. An algebraic two-layer eddy viscosity model is used for turbulent flow calculations. The programs are operational on Control Data CYBER-200 series vector-processing computer system and have been optimized to take maximum advantage of the vector processing computer system and have been optimized to take maximum advantage of the vector processing capability of the system. Since their development, the programs have been extensively verified and used to analyze a number of very complex inlet configurations. In this paper, results are presented from two-dimensional, quasi-three-dimensional, and three-dimensional analyses of the inlet flow field to illustrate the use of the programs.

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 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Analysis Study of the Reacting Flow in a Scramjet Airbreathing Engine written by Marc Núñez Corbacho and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Scramjet engines are the fastest form of propulsion that has been conceived, being capable offlying in a flight regime above Mach number 5. The concept of scramjet engine is not recent,as its development started more than half a century ago. However, a scramjet vehicle has onlyflown three times (by NASA), being the last one in 2004 and reaching a Mach number of 10.The working principle of a scramjet engine is the same as the subsonic engines: compressing,combusting and expanding air to produce thrust. Nevertheless, scramjet engines do not havemoving parts such a compressor or a turbine, as the flow at hypersonic speed is compresseddirectly by the inlet and the combustion is held in supersonic regime.In this study, a parametric model for the combustor and nozzle of a scramjet engine has beendeveloped, focusing in the combustion process. Under quasi-one-dimensional steady flowconditions, the properties at the exit of the combustor and nozzle are computed by calculatingthe composition of the gas at the combustor for different conditions of temperature, fuel ratio,pressure and velocity.Also, in order to assess the performance of the engine, a simplified inlet model is assumed.Finally, the results of this document are compared with those of other studies. Some possibleimprovements of the study are also included.

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 Scramjet Propulsion written by E. T. Curran and published by AIAA. This book was released on 2001 with total page 1354 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 Analysis of the Scramjet Inlet Flow Field Using Two dimensional Navier Stokes Equations written by Ajay Kumar and published by . This book was released on 1982 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Study of Innovative Scramjet Inlets Coupled to Combustors Using Hydrocarbon air Mixture written by Faure Joel Malo-Molina and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: To advance the design of hypersonic vehicles, high-fidelity multi-physics CFD is used to characterize 3-D scramjet flow-fields in two novel streamline traced configurations. The two inlets, Jaws and Scoop, are analyzed and compared to a traditional rectangular inlet used as a baseline for on/off-design conditions. The flight trajectory conditions selected are Mach 6 and a dynamic pressure of 1,500 psf (71.82 kPa). Analysis of these hypersonic inlets is performed to investigate distortion effects downstream with multiple single cavity combustors acting as flame holders, and several fuel injection strategies. The best integrated scramjet inlet/combustor design is identified. The flow physics is investigated and the integrated performance impact of the two innovative scramjet inlet designs is quantified. Frozen and finite rate chemistry is simulated with 13 gaseous species and 20 reactions for an Ethylene/air finite-rate chemical model. In addition, URANS and LES modeling are compared to explore overall flow structure and to contrast individual numerical methods. The flow distortion in Jaws and Scoop is similar to some of the distortion in the traditional rectangular inlet, despite design differences. The baseline and Jaws performance attributes are stronger than Scoop, but Jaws accomplishes this while eradicating the cowl lip interaction, and lessening the total drag and spillage penalties.

Download or read book Numerical Study of Control of Dynamic Properties of a Supersonic Inlet Using Bypass Bleed written by Clarence W. Matthews and published by . This book was released on 1971 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Analysis on MHD Energy Bypass Scramjet Engine Characteristics written by and published by . This book was released on 2003 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quasi-one dimensional numerical simulation throughout an engine was carried out for detailed performance analysis. Simple scramjet engine model including inlet, MHD generator, combustor, MHD accelerator, and expansion nozzle was introduced. MacCormack method was employed for unsteady numerical simulations. Maximum combustor exit stagnation temperature was set for the operating condition. Engine performance was evaluated by inlet-to-exit thrust normalized by mass flow rate. Dependency of engine performance on flight Mach number was investigated. MHD generator bad successfully reduced the stagnation temperature prior to the combustor which enabled greater energy injection at the combustor. Therefore, by introducing the MHD energy bypass system, scramjet engine was shown to improve its thrust performance at high Mach number conditions. Qualitative agreement with analytical calculation was obtained, although the phenomenon of thermal choking in the MHD generator and the combustor was found as operating limitations. Strong dependence of thrust on channel configurations were also found.

Download or read book Numerical Analysis of the Scholar Supersonic Combustor written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-03 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The SCHOLAR scramjet experiment is the subject of an ongoing numerical investigation. The facility nozzle and combustor were solved separate and sequentially, with the exit conditions of the former used as inlet conditions for the latter. A baseline configuration for the numerical model was compared with the available experimental data. It was found that ignition-delay was underpredicted and fuel-plume penetration overpredicted, while the pressure rise was close to experimental values. In addition, grid-convergence by means of grid-sequencing could not be established. The effects of the different turbulence parameters were quantified. It was found that it was not possible to simultaneously predict the three main parameters of this flow: pressure-rise, ignition-delay, and fuel-plume penetration.Rodriguez, Carlos G. and Cutler, Andrew D.Langley Research CenterNUMERICAL ANALYSIS; SUPERSONIC COMBUSTION RAMJET ENGINES; COMPUTATIONAL FLUID DYNAMICS; COMPUTATIONAL GRIDS; TURBULENCE; NOZZLE DESIGN; IGNITION; INLET FLOW; PLUMES; FUELS

Download or read book NASA Technical Paper written by 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 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 The Proceedings of the 2018 Asia Pacific International Symposium on Aerospace Technology APISAT 2018 written by Xinguo Zhang and published by Springer. This book was released on 2019-06-08 with total page 3068 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a compilation of peer-reviewed papers from the 2018 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2018). The symposium is a common endeavour between the four national aerospace societies in China, Australia, Korea and Japan, namely, the Chinese Society of Aeronautics and Astronautics (CSAA), Royal Aeronautical Society Australian Division (RAeS Australian Division), the Korean Society for Aeronautical and Space Sciences (KSAS) and the Japan Society for Aeronautical and Space Sciences (JSASS). APISAT is an annual event initiated in 2009 to provide an opportunity for researchers and engineers from Asia-Pacific countries to discuss current and future advanced topics in aeronautical and space engineering.

Download or read book Hypersonic Airbreathing Propulsion written by William H. Heiser and published by AIAA. This book was released on 1994 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: An almost entirely self-contained engineering textbook primarily for use in undergraduate and graduate courses in airbreathing propulsion. It provides a broad and basic introduction to the elements needed to work in the field as it develops and grows. Homework problems are provided for almost every individual subject. An extensive array of PC-based user-friendly computer programs is provided in order to facilitate repetitious and/or complex calculations. Annotation copyright by Book News, Inc., Portland, OR

Download or read book NASA Scientific and Technical Publications written by and published by . This book was released on 1987 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1983 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt: