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�������պ����ѧѧ�� 2003, Vol. 29 Issue (11) :1033-1037    DOI:
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ף����, ��־ӽ*
�������պ����ѧ ���տ�ѧ�빤��ѧԺ, ���� 100083
Unsteady structures over delta wings
Zhu Liguo, Lü Zhiyong*
School of Aeronautics Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� Visualization with light sheet and PIV tests were performed to investigate some unsteady structures over delta wings. Discrete sub-vortices in the vortex sheet, interaction of the secondary vortex with main vortex, the frequency characteristics of the spiral form of vortex breakdown, the fluctuation of breakdown location, and vortex shedding at high angles of attack were studied respectively. Different frequency is given for unsteady structures.
Keywords�� flow visualization   delta wings   vortex   particle image velocimetry   unsteady     
Received 2003-07-03;

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About author: ף����(1977-),��,����������,��ʿ��,lgzhu@vip.sina.com.
ף����, ��־ӽ.�������������еķǶ��������о�[J]  �������պ����ѧѧ��, 2003,V29(11): 1033-1037
Zhu Liguo, L�� Zhiyong.Unsteady structures over delta wings[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2003,V29(11): 1033-1037
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