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PDF approach for compressible turbulent reacting flowsThe objective of the present work is to develop a probability density function (pdf) turbulence model for compressible reacting flows for use with a CFD flow solver. The probability density function of the species mass fraction and enthalpy are obtained by solving a pdf evolution equation using a Monte Carlo scheme. The pdf solution procedure is coupled with a compressible CFD flow solver which provides the velocity and pressure fields. A modeled pdf equation for compressible flows, capable of capturing shock waves and suitable to the present coupling scheme, is proposed and tested. Convergence of the combined finite-volume Monte Carlo solution procedure is discussed, and an averaging procedure is developed to provide smooth Monte-Carlo solutions to ensure convergence. Two supersonic diffusion flames are studied using the proposed pdf model and the results are compared with experimental data; marked improvements over CFD solutions without pdf are observed. Preliminary applications of pdf to 3D flows are also reported.
Document ID
19930040232
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hsu, A. T.
(NASA Lewis Research Center Cleveland, OH, United States)
Tsai, Y.-L. P.
(NASA Lewis Research Center Cleveland, OH, United States)
Raju, M. S.
(Sverdrup Technology Inc., Brook Park; NASA, Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
AIAA PAPER 93-0087
Meeting Information
Meeting: AIAA, Aerospace Sciences Meeting and Exhibit
Location: Reno, NV
Country: United States
Start Date: January 11, 1993
End Date: January 14, 1993
Sponsors: AIAA
Accession Number
93A24229
Funding Number(s)
CONTRACT_GRANT: NAS3-25266
Distribution Limits
Public
Copyright
Other

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