| 旋翼近地飞行时尾迹及地面涡的N─S方程模拟 |
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| 引用本文： | 康宁,孙茂.旋翼近地飞行时尾迹及地面涡的N─S方程模拟[J].航空学报,1996,17(Z1):8-13. |
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| 作者姓名： | 康宁 孙茂 |
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| 作者单位： | 北京航空航天大学流体力学研究所, 北京, 100083 |
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| 摘 要： | 用有限体积法、三维Ｎ－Ｓ方程对旋翼近地飞行时的尾迹及地面涡进行了数值模拟。由分布在特定区域内的动量源项模拟旋翼对流场的作用，动量源项的强度由旋翼的几何尺寸、叶片剖面的空气动力特性及当地流场的性质迭代定出。进而，研究了旋翼近地飞行时，在不同前进比及不同离地高度情况下，尾迹与地面的干扰问题及地面涡的现象
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| 关 键 词： | 旋翼空气动力学 地面效应 有限体积法 |
NAVIER STOKES CALCULATIONS OF WAKE AND GROUND VORTEX INDUCED BY A ROTOR IN FORWARD FLIGHT WITH GROUND EFFECTS |
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| Kang Ning,Sun Mao.NAVIER STOKES CALCULATIONS OF WAKE AND GROUND VORTEX INDUCED BY A ROTOR IN FORWARD FLIGHT WITH GROUND EFFECTS[J].Acta Aeronautica et Astronautica Sinica,1996,17(Z1):8-13. |
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| Authors: | Kang Ning Sun Mao |
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| Institution: | Fluid Mechanics Institute, Beijing University of Aeronautics and Astronautics, Beijing, 100083 |
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| Abstract: | A finite volume method is used to solve the 3 D Navier Stokes equations to imitate the flow field and performance characteristics of a rotor in a forward flight near the ground. The rotor is modeled as a distribution of momentum sources, the strengths of which are determined from an iterative manner of calculating the local flow field properties, the rotor geometry and the aerodynamic characteristics of the blade cross section. The disturbance of wake with the ground and the phenomenon of the ground vortex are investigated for several advance ratios and flight heights. |
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| Keywords: | rotor aerodynam ics ground effects finite volume method |
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