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�������պ����ѧѧ�� 2003, Vol. 29 Issue (4) :321-326    DOI:
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Direct Numerical Simulation of Coherent Structures in a Boundary Layer��with Steady Pressure Gradients
Li Zhaorui1, Lu Lipeng2, Zhang Qiang1*
1. Dept. of Propulsion, Beijing University of Aeronautics and Astronautics;
2. Institute of Mechanics Laboratory for Nonlinear Mechanics of Continuous Media, Chinese Academy of Sciences

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Abstract�� By using the method of direct numerical simulation(DNS), evolution of coherent structures in the wall region of a turbulent boundary layer with three different pressure gradients was studied. Initial values of the coherent structures in the wall region were obtained on the basis of the idea of resonant triad in the theory of hydrodynamic stability. It was found that the results of DNS match with those of the experiments very well in many aspects. The effects of pressure gradient on coherent structure were obtained by comparing the results of three different cases.
Keywords�� turbulent boundary layer   pressure gradient   numerical simulation   wave     
Received 2002-01-11;
Fund:

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������, ½����, ��ǿ.����ѹ���ݶȱ߽����ɽṹ��ֱ����ֵģ��[J]  �������պ����ѧѧ��, 2003,V29(4): 321-326
Li Zhaorui, Lu Lipeng, Zhang Qiang.Direct Numerical Simulation of Coherent Structures in a Boundary Layer��with Steady Pressure Gradients[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2003,V29(4): 321-326
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