Open Access

ARTICLE

Numerical Investigations on the Impact of Turbulent Prandtl Number and Schmidt Number on Supersonic Combustion

Yongkang Zheng^1,2,*, Chao Yan¹

1 National Key Laboratory of Computational Fluid Dynamics, Beihang University, Beijing, 100191, China
2 State Key Laboratory of Aerodynamics, Mianyang, 621000, China

* Corresponding Author: Yongkang Zheng. Email:

(This article belongs to this Special Issue: High-Speed and High-Temperature Flows)

Fluid Dynamics & Materials Processing 2020, 16(3), 637-650. https://doi.org/10.32604/fdmp.2020.09694

Received 15 January 2020; Accepted 08 April 2020; Issue published 25 May 2020

Abstract

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.

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Citations