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Volume 38 Issue 5
May  2012
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Journal of Beijing University of Aeronautics and Astronautics  > 2012  >  38(5): 654-658.
Ma Chao, Cao Yihua, Xu Zhongdaet al. Numerical simulation of helicopter slung-load flow field and fins design[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, 38(5): 654-658. (in Chinese)
Citation: Ma Chao, Cao Yihua, Xu Zhongdaet al. Numerical simulation of helicopter slung-load flow field and fins design[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, 38(5): 654-658. (in Chinese)
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Numerical simulation of helicopter slung-load flow field and fins design

  • School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 17 Jan 2011
  • Publish Date: 30 May 2012
    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.

     

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