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�������պ����ѧѧ�� 2003, Vol. 29 Issue (1) :39-42    DOI:
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Effects of Geometry Parameters and Flow Parameters on�� Drag Coefficient of Upswept Afterbodies
Kong Fanmei, Hua Jun, Feng Ya'nan, Qiu Dong*
Dept. of Flight Vehicle Design and Applied Mechanics, Beijing University of Aeronautics and Astronautics

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Abstract�� The flows over upswept afterbodies were investigated by a numerical method based on 3D compressible N-S equations, in order to study effects of geometry parameters and flow parameters on drag coefficient of upswept afterbodies. The results showed that the pressure drag coefficient increases rapidly with increasing upswept angle and contraction ratio respectively, and with decreasing forebody incidence. The friction drag coefficient increases with increasing afterbody fineness ratio and decreasing Reynolds Number. The more the afterbody flatness, the more the pressure drag. The wave drag coefficient also increases with increasing upswept angle at transonic speed.
Keywords�� separated flow   vortex   upswept afterbody     
Received 2001-07-06;
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�׷���, ����, ������, ��.���κ��������������̺�������ϵ����Ӱ��[J]  �������պ����ѧѧ��, 2003,V29(1): 39-42
Kong Fanmei, Hua Jun, Feng Ya'nan, Qiu Dong.Effects of Geometry Parameters and Flow Parameters on�� Drag Coefficient of Upswept Afterbodies[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2003,V29(1): 39-42
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