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Combustion in High-Speed Flows

Combustion in High-Speed Flows
Author: John Buckmaster
Publisher: Springer Science & Business Media
Total Pages: 639
Release: 2012-12-06
Genre: Technology & Engineering
ISBN: 9401110506

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This volume contains the proceedings of the Workshop on Com bustion, sponsored by the Institute for Computer Applications in Science and Engineering (ICASE) and the NASA Langley Research Center (LaRC). It was held on October 12-14, 1992, and was the sec ond workshop in the series on the subject. The first was held in 1989, and its proceedings were published by Springer-Verlag under the title "Major Research Topics in Combustion," edited by M. Y. Hussaini, A. Kumar, and R. G. Voigt. The focus of the second workshop was directed towards the development, analysis, and application of basic models in high speed propulsion of particular interest to NASA. The exploration of a dual approach combining asymptotic and numerical methods for the analysis of the models was particularly encouraged. The objectives of this workshop were i) the genesis of models that would capture or reflect the basic pllysical phenomena in SCRAMJETs and/or oblique detonation-wave engines (ODWE), and ii) the stimulation of a greater interaction between NASA exper imental research community and the academic community. The lead paper by D. Bushnell on the status and issues of high speed propulsion relevant to both the SCRAMJET and the ODWE parallels his keynote address which set the stage of the workshop. Following the lead paper were five technical sessions with titles and chairs: Experiments (C. Rogers), Reacting Free Shear Layers (C. E. Grosch), Detonations (A. K. Kapila), Ignition and Struc ture (J. Buckmaster), and Unsteady Behaviour ('1'. L. Jackson).


Theories of Turbulent Combustion in High Speed Flows

Theories of Turbulent Combustion in High Speed Flows
Author:
Publisher:
Total Pages: 7
Release: 1993
Genre:
ISBN:

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This research involves theoretical studies of the chemical and fluid mechanical phenomena which make turbulent combustion in high-speed flows different from such combustion in low-speed flows. Finite-rate chemistry plays a significant role in high-speed flows because of the small ratios of flow times to chemical times. The studies address ignition and extinction phenomena in nonpremixed turbulent combustion of hydrogen-air systems by both numerical and asymptotic methods. Attention also is paid to effects of compressibility in high-speed turbulent combustion, with consideration given to interdispersal configurations of shocklets and flamelets. Efforts are made to provide a firmer foundation for the modeling of high-speed turbulent reacting flows, to aid in the development of a formulation which gives results that can be compared with experiments, on turbulent combustion ... Turbulent flames, Diffusion flames, Supersonic combustion.


PDF Methods for Combustion in High-Speed Turbulent Flows

PDF Methods for Combustion in High-Speed Turbulent Flows
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
Total Pages: 28
Release: 2018-12-29
Genre: Science
ISBN: 9781792728624

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This report describes the research performed during the second year of this three-year project. The ultimate objective of the project is extend the applicability of probability density function (pdf) methods from incompressible to compressible turbulent reactive flows. As described in subsequent sections, progress has been made on: (1) formulation and modelling of pdf equations for compressible turbulence, in both homogeneous and inhomogeneous inert flows; and (2) implementation of the compressible model in various flow configurations, namely decaying isotropic turbulence, homogeneous shear flow and plane mixing layer. Pope, Stephen B. NASA-CR-199357, NAS 1.26:199357 NAG1-1542...


Theories of Turbulent Combustion in High Speed Flows

Theories of Turbulent Combustion in High Speed Flows
Author:
Publisher:
Total Pages: 0
Release: 1991
Genre:
ISBN:

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Since Damkohler and Reynolds numbers over the range of conditions relevant to supersonic hydrogen-air combustion were found to be consistent with the combustion occurring in the reaction-sheet regime, detailed numerical integrations were performed on the structures of counterflow hydrogen-air diffusion flames, for pressure from 0.5 to 10 atm and air temperatures from 300 K to 1200 K, at a hydrogen temperature of 300 K. The results showed extinction to occur at high enough rates of strain in most cases, but no extinction for air temperatures above 1000 K. Nitrogen chemistry was shown to have a negligible effect, and reduced chemical-kinetic mechanisms were developed for simplifying the computations. The compound extinction strain rates were found to be in excellent agreement with newly performed experiments. Compressibility effects are being taken into account, and the results are being worked into methods for describing turbulent combustion in high-speed flows.


IUTAM Symposium on Combustion in Supersonic Flows

IUTAM Symposium on Combustion in Supersonic Flows
Author: M. Champion
Publisher: Springer Science & Business Media
Total Pages: 413
Release: 2012-12-06
Genre: Science
ISBN: 9401154325

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Proceedings of the IUTAM Symposium held in Poitiers, France, 2-6 October 1995


High Speed Internal Combustion Engines

High Speed Internal Combustion Engines
Author: Arthur William Judge
Publisher:
Total Pages: 372
Release: 1918
Genre: Internal combustion engines
ISBN:

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