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�������պ����ѧѧ�� 2011, Vol. 37 Issue (5) :610-614    DOI:
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Characteristic analysis of flow load around head during vehicles exit of water
You Tianqing, Zhang Jiazhong, Wang Cong, Cao Wei*
School of Astronautics, Harbin Institute of Technology, Harbin 150001, China

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Abstract�� During water-exit of underwater vehicle, the violent change of flow field is very complex. In order to investigate the variation of hydrodynamic load, the water-exit of underwater vehicles was simulated by a viscous flow solver with homogeneous multiphase flow model and cavitaion model. The effect of different head shape and pitching angle on the water-exit flow field was analyzed by the numerical method. The analysis result indicates that the head shape with stronger cavitation capability, which maintains local cavity, can cause more severe flow field change and produce massive pressure on the hull of vehicle. The result also indicates the flow field of water-exit process with pitching angle is asymmetric which forms the powerful moment applied on the vehicle. And the pitching angle has a great impact on the variation of moment.
Keywords�� cavitation   water-exit   multiphase flow   underwater vehicles     
Received 2010-02-28;

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About author: ������(1984-),��,���������������,��ʿ��,ytianqing@gmail.com.
������, �ż���, ����, ��ΰ.�������ˮ����ͷ�������غ����Է���[J]  �������պ����ѧѧ��, 2011,V37(5): 610-614
You Tianqing, Zhang Jiazhong, Wang Cong, Cao Wei.Characteristic analysis of flow load around head during vehicles exit of water[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2011,V37(5): 610-614
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