NDLI: High speed turbulent reacting flows: dns and les

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High speed turbulent reacting flows: dns and les

Content Provider	NASA Technical Reports Server (NTRS)
Author	Givi, Peyman
Copyright Year	1990
Description	Work on understanding the mechanisms of mixing and reaction in high speed turbulent reacting flows was continued. Efforts, in particular, were concentrated on taking advantage of modern computational methods to simulate high speed turbulent flows. In doing so, two methodologies were used: large eddy simulations (LES) and direct numerical simulations (DNS). In the work related with LES the objective is to study the behavior of the probability density functions (pdfs) of scalar properties within the subgrid in reacting turbulent flows. The data base obtained by DNS for a detailed study of the pdf characteristics within the subgrid was used. Simulations are performed for flows under various initializations to include the effects of compressibility on mixing and chemical reactions. In the work related with DNS, a two-dimensional temporally developing high speed mixing layer under the influence of a second-order non-equilibrium chemical reaction of the type A + B yields products + heat was considered. Simulations were performed with different magnitudes of the convective Mach numbers and with different chemical kinetic parameters for the purpose of examining the isolated effects of the compressibility and the heat released by the chemical reactions on the structure of the layer. A full compressible code was developed and utilized, so that the coupling between mixing and chemical reactions is captured in a realistic manner.
File Size	168325
Page Count	2
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19910004000
Archival Resource Key	ark:/13960/t0cv9dm65
Language	English
Publisher Date	1990-09-01
Access Restriction	Open
Subject Keyword	Fluid Mechanics And Heat Transfer Turbulent Flow Compressibility Chemical Reactions Computerized Simulation Magnitude Convection Probability Density Functions Data Bases Vortices Reaction Kinetics High Speed Scalars Mixing Layers Fluids Mach Number Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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