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�������պ����ѧѧ�� 2004, Vol. 30 Issue (12) :1221-1224    DOI:
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��ӭ��, ���ʷ�, ������*
�������պ����ѧ ���տ�ѧ�빤��ѧԺ ���� 100083
Numerical simulation of separation flow around flaps with varied gap size
Chen Yingchun, Zhang Panfeng, Wang Jinjun*
School of Aeronautic Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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ժҪ �ڷǽṹ������,����SIMPLE�㷨��������״�߽��ģ�������ŵƽ��N-S����.�о��˵ײ���϶��ƽ������Ƭ����ķ����ٸ������ṹ��Ӱ��.����������ײ���϶����Ƭ�������ṹ��Ҫ�ɶ��������͵ײ���϶����Ӱ��.�ײ���϶�Ĵ�С������������ǿ��,���վ����������Ľṹ.���ŵײ���϶������,���������˷�յ��л��������������Ż������Լ�ƽ������3�������ṹ.����֮��ķֽ��ֱ���������Ƭ�������ټ�϶��g/h��=0.2,0.4.�ײ���϶0.2����g/h����0.4,�װ�ѹ���ֲ��������ֲ���,��˲���Ӱ����Ӧ���ڷɻ������ľ�̬��������.
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Abstract�� The flow around the plate flaps with base vent was studied by numerical simulation. The Reynolds averaged Navier-Stokes equations were solved by SIMPLE method combined with two-layer zonal boundary layer model. The flow structure depends on the interaction of the separated shear layer from the up edge of the flap and the jet from the base vent. The intensity of the jet is caused by the base vent size and affects the flow structure around the flap. There are three kinds of flow patterns occurred with different base vent sizes. They are closedsingle vortex re-circulation region, jet & re-circulation region and the closed two vortices wake of flat plate region. The separate points of these three regions are ��g/h��=0.2, 0.4, here g and h are the sizes of base vent and the flap width, respectively. For the small gap size (0.2<��g/h��<0.4), the flaps all have a large suction re-circulation region, which is similar to that of the case without vent. Hence, the base vent will not reduce the static efficiency of the flap on the wing.
Keywords�� flap   pressure distribution   two-layer zonal model     
Received 2003-11-03;


About author: ��ӭ��(1961-),��,����������,��ʿ��, cyc0616@avicl-fai.com.
��ӭ��, ���ʷ�, ������.����Ƭ�����������Ե���ֵ�о�[J]  �������պ����ѧѧ��, 2004,V30(12): 1221-1224
Chen Yingchun, Zhang Panfeng, Wang Jinjun.Numerical simulation of separation flow around flaps with varied gap size[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2004,V30(12): 1221-1224
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