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Effects of radiative heat transfer on the structure of turbulent supersonic channel flow

Published online by Cambridge University Press:  15 April 2011

S. GHOSH
Affiliation:
Lehrstuhl für Aerodynamik, TU München, Boltzmannstr 15, 85748 Garching, Germany
R. FRIEDRICH*
Affiliation:
Lehrstuhl für Aerodynamik, TU München, Boltzmannstr 15, 85748 Garching, Germany
M. PFITZNER
Affiliation:
Institut für Thermodynamik, Universität der Bundeswehr München Werner-Heisenberg-Weg 39, 85577 Neubiberg, Germany
CHR. STEMMER
Affiliation:
Lehrstuhl für Aerodynamik, TU München, Boltzmannstr 15, 85748 Garching, Germany
B. CUENOT
Affiliation:
CERFACS, 42 Avenue G. Coriolis, 31057 Toulouse, France
M. EL HAFI
Affiliation:
Laboratoire de Génie des Procédés des Solides Divisés, Ecole des Mines d'Albi Carmaux, 81013 Albi, France
*
Email address for correspondence: r.friedrich@lrz.tum.de

Abstract

The interaction between turbulence in a minimal supersonic channel and radiative heat transfer is studied using large-eddy simulation. The working fluid is pure water vapour with temperature-dependent specific heats and molecular transport coefficients. Its line spectra properties are represented with a statistical narrow-band correlated-k model. A grey gas model is also tested. The parallel no-slip channel walls are treated as black surfaces concerning thermal radiation and are kept at a constant temperature of 1000 K. Simulations have been performed for different optical thicknesses (based on the Planck mean absorption coefficient) and different Mach numbers. Results for the mean flow variables, Reynolds stresses and certain terms of their transport equations indicate that thermal radiation effects counteract compressibility (Mach number) effects. An analysis of the total energy balance reveals the importance of radiative heat transfer, compared to the turbulent and mean molecular heat transport.

Type
Papers
Copyright
Copyright © Cambridge University Press 2011

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