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�������պ����ѧѧ�� 2002, Vol. 28 Issue (5) :585-588    DOI:
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�Ű�ɽ, ��־ӽ, ף����*
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Experimental Study on Flow Construction over Spur Dikes
ZHANG Bai-shan,Lü Zhi-yong, ZHU Li-guo*
Beijing University of Aeronautics and Astronautics, Dept. of Flight Vehicle Design and Applied Mechanics

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Abstract�� To understand effect of number and incidence of spur-dikes on flow pattern, flow construction over spur-dikes was studied by flow visualization and light sheet technique in a water channel. There are horse-shoe vortex around spur-dikes and Karman vortices behind spur-dikes. Depending on Reynolds number, flow patterns over spur-dikes can be divided into 4 types: steady single horse-shoe vortex; unsteady single horse-shoe vortex; unsteady double horse-shoe vortices �� and unsteady double horse-shoe vortices ��. If number and incidence of spur-dike decrease, intensity of horseshoe vortex and Karman vortices decrease.
Keywords�� vortex   flow visualization   flow separation   flow pattern     
Received 2001-03-12;
About author: �Ű�ɽ(1958-),��,���Ͽ�����,��ʿ��,100083,����.
�Ű�ɽ, ��־ӽ, ף����.�ƶ��������ṹʵ���о�[J]  �������պ����ѧѧ��, 2002,V28(5): 585-588
ZHANG Bai-shan,L�� Zhi-yong, ZHU Li-guo.Experimental Study on Flow Construction over Spur Dikes[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2002,V28(5): 585-588
http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2002/V28/I5/585
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