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�������պ����ѧѧ�� 2012, Vol. 38 Issue (5) :654-658    DOI:
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��, ���廪, ���Ҵ�*
�������պ����ѧ ���տ�ѧ�빤��ѧԺ, ���� 100191
Numerical simulation of helicopter slung-load flow field and fins design
Ma Chao, Cao Yihua, Xu Zhongda*
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� Tow 3D slung-load models of helicopter were built by the CAD software according to the known geometry data. Fins of the first slung-load were designed with the method of mapping pictures. Through methods of computational fluid dynamics(CFD), the slung-load with fins was calculated and analyzed, and the result of aerodynamic resistance between CFD methods and theory methods had good agreement. Moreover, the second slung-load with fins of UH-60 Black Hawk helicopter was calculated through CFD methods, and the flow field interaction between fins and slung-load was investigated. By the calculation of two cases, fins were proved for ensuring the directional stability of slung-load crucially in flight. Then a design method of slung-load fins based on hypothesis of ignoring air damping force was presented, and the second slung-load fins were designed through the method. The impacts of fins on the directional stability of slung-load were consistent with the wind tunnel tests.
Keywords�� helicopter   slung-load   computational fluid dynamics(CFD)   fin   directional stability     
Received 2011-01-17;
��, ���廪, ���Ҵ�.ֱ��������������ֵģ����β����Ʒ���[J]  �������պ����ѧѧ��, 2012,V38(5): 654-658
Ma Chao, Cao Yihua, Xu Zhongda.Numerical simulation of helicopter slung-load flow field and fins design[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2012,V38(5): 654-658
http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2012/V38/I5/654
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