TY - EJOU AU - Zheng, Yongkang AU - Yan, Chao TI - Numerical Investigations on the Impact of Turbulent Prandtl Number and Schmidt Number on Supersonic Combustion T2 - Fluid Dynamics \& Materials Processing PY - 2020 VL - 16 IS - 3 SN - 1555-2578 AB - The flow field inside the combustor of a scramjet is highly complicated and the related turbulent Prandtl and Schmidt numbers have a significant impact on the effective numerical prediction of such dynamics. As in many cases researchers set these parameters on the basis of purely empirical laws, assessing their impact (via parametric numerical simulations) is a subject of great importance. In the present work, in particular, two test cases with different characteristics are selected for further evaluation of the role played by these non-dimensional numbers: Burrows-Kurkov case and DLR case. The numerical results indicate that these parameters influence ignition location. Moreover, the temperature distribution is more sensitive to them than to H2O mass fraction and velocity distributions. KW - Turbulent Prandtl number; turbulent Schmidt number; ignition position; supersonic combustion DO - 10.32604/fdmp.2020.09694