Effects of radiative heat transfer on the turbulence structure in inert and reacting mixing layers

摘要: We use large-eddy simulation to study the interaction between turbulence and radiative heat transfer in low-speed inert reacting plane temporal mixing layers. An explicit filtering scheme based on approximate deconvolution is applied treat closure problem arising from quadratic nonlinearities of filtered transport equations. In case, working fluid a mixture ideal gases where stream consists hydrogen nitrogen high-speed oxygen nitrogen. Both streams are premixed way that free-stream densities same stoichiometric fraction 0.3. The release term modelled using equilibrium chemistry. at temperature 1000 K highspeed pure water vapour 2000 K, when radiation turned off. Simulations assuming gas mixtures as gray with artificially increased Planck mean absorption coefficients performed which code PRISSMA fully coupled. both cases, found clearly affect fluctuations thermodynamic variables, Reynolds stresses, stress budget terms like pressure-strain correlations. Source equation for variance used explain decrease this case its increase case.