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.
����,���廪,���֪.ֱ�������ҷ���ƽ�⡢�ȶ�����������о�[J].���ն���ѧ��,2010,25(10):2307-2311 Cui Li,Cao Yihua,Li Guozhi.Studies on trims,stability,and controllability of helicopter with slung-load [J].Journal of Aerospace Power,2010,25(10):2307-2311(in Chinese)
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