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�������պ����ѧѧ�� 2007, Vol. 33 Issue (10) :1131-1135    DOI:
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Comparison of two-equation turbulent models for hypersonic flow simulations
Liu Jingyuan, Lee Chunhian*
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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ժҪ �Ի���Reynolds��Favré(�ܶȼ�Ȩ)���ƽ���Ķ���������ģ�ͽ���������,ͬʱ������ֵģ��߳���������ʱ������и߷ֱ��ʲ�׽��������ڱ߽����������ֵճ�Ե�������Ҫ��,������µ��ܱ���С(TVD)��ʽ����������.�ڴ˻�����,ͨ����ѹ���սǵĸ߳�������������ֵģ��,�Ի���Reynolds��Favré���ƽ���Ķ���������ģ��,�Լ���������ѹ��ģ�ͼ���ѹ��������ģ�ͽ����˶Ա�,��ʾ�˲�ͬ����ģ�ͼ���ѹ���������ڼ������ѹ���ֲ��������ֲ��ϵ��ص�,˵���˶Ը߳�����ѹ���ս�������,����ģ�Ϳ�ѹ�������ı�Ҫ��,�õ��˻���Reynolds��Favré���ƽ���Ķ���������ģ�͵ļ�������ӽ�ʵ����.
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Abstract�� A two-equation turbulent model based on the mixed Reynolds and Favré (density weighted) average was modified for hypersonic compressible turbulence. In order to suppress the influences of the numerical viscosity toward the boundary layer, and yet to maintain simultaneously the high resolution on capturing the disco ntinuities in the hypersonic flow field, a new entropy correction function was proposed for the total variation diminishing (TVD) scheme. A test case on hypersonic flows over a ramp was then computed using the modified mixed averaged model, as well as the incompressible models proposed by the others together with their respective compressibility correction models. The comparative study shows that the compressibility corrections to the two-equation turbulence models are necessary for hypersonic ramp-type flows, and the numerical results by the modified mixed averaged model are closest to the experiments simultaneously.
Keywords�� turbulent mode   numerical simulation   hypersonic   compressibility   heat transfer     
Received 2006-10-24;
About author: ����Դ(1976��),��,������ԭ��,��ʿ��,jjliouu@163.com.
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����Դ,���.�߳����ٶ���������ģ�͵���ֵģ��Ա�[J]  �������պ����ѧѧ��, 2007,V33(10): 1131-1135
Liu Jingyuan, Lee Chunhian.Comparison of two-equation turbulent models for hypersonic flow simulations[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(10): 1131-1135
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