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�������պ����ѧѧ�� 2010, Vol. 36 Issue (2) :244-247    DOI:
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Laminar-to-turbulent transition onset prediction of hypersonic flows based on laminar kinetic energy equation
Song Bo,Lee Chun-Hian*
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ ͨ���������ȶ������۵ķ����������������˷���,Ԥ����������Ma��Ϊ5.91��ȹ׶���������IJ���-����ת���,������SST(Shear-Stress Transport)����ģ�ͽ�ϴ�����Ъ����ģ�Ͷ�ת��������������ֵģ��.������������������������˷���ģ�Ϳ��Ժܺõز�׽��ѹ�ݶȶ�ת��ǰ�ڱ߽���ڵIJ��ȶ�����Ƶ�ʵ�Ӱ��.���±��������¼���õ���ת��λ���뾲�綴ʵ��������һ��.������ȴ�ٽ���2ģ̬���ȶ�����������,ʹת����ǰ����.������Ъ����ģ��ģ��������������ת�������Ƚ϶�,�¶ȷ�ֵƫ��.
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Abstract�� Onset locations of laminar-to-turbulent transition were predicted for flared-cones with freestream Ma of 5.91 by solving a laminar kinetic energy transport equation based on the linear stability theory numerically. The transitional flowfields were simulated by employing the shear-stress transport(SST) turbulence model, in conjunction with an algebraic intermittency model. Numerical results demonstrate that the current laminar kinetic energy transport equation is capable of predicting the frequencies of unstable disturbances under adverse pressure gradients. The computed transition onset locations of adiabatic wall are in good agreement with experiment data measured from the quiet wind tunnels. Wall cooling promotes the growth of second mode instability, and transition occurs earlier. The length of the transitional zone and temperature peak value are not adequate when the algebraic intermittency model is employed.
Keywords�� laminar kinetic energy   transition prediction   quiet wind tunnel     
Received 2009-06-19;
About author: �� ��(1982-),Ů,����������,��ʿ��,imsongb@gmail.com.
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�� ��, ���.���ڷ������������ܷ��̵ĸ߳�����ת��Ԥ��[J]  �������պ����ѧѧ��, 2010,V36(2): 244-247
Song Bo,Lee Chun-Hian.Laminar-to-turbulent transition onset prediction of hypersonic flows based on laminar kinetic energy equation[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2010,V36(2): 244-247
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2010/V36/I2/244
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