| 基于广义动态尾迹理论的旋翼非定常气动特性分析 |
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| 引用本文： | 史勇杰,招启军,徐国华.基于广义动态尾迹理论的旋翼非定常气动特性分析[J].直升机技术,2008(3):19-24. |
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| 作者姓名： | 史勇杰 招启军 徐国华 |
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| 作者单位： | 南京航空航天大学直升机旋翼动力学国家级重点实验室,南京,210016 |
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| 摘 要： | 本文建立了一套时域下前飞旋翼非定常气动载荷的计算方法.考虑人流的非均匀性,采用"Peters-He"广义动态尾迹人流模型;为计人气流压缩性、动态特性对气动载荷幅值和相位的影响,翼型剖面升力使用Leishman-Beddoes二维非定常模型计算.为分析旋翼非定常气动特性,建立模型方程的状态空间形式,并采用四阶Runge-Kutta法求解,以提高计算效率.以美国H-34直升机前飞状态为算例,并将计算结果与飞行测试数据进行比较,验证了计算方法的有效性,在此基础上,进一步分析了诱导速度、迎角、升力分布随前进比的变化,以及不同桨叶气动外形(桨尖尖削、负扭转)对旋翼气动特性的影响,得出了一些有意义的结论.
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| 关 键 词： | 旋翼 气动特性 动态尾迹 直升机 |
Analysis on the Rotor Unsteady Aerodynamic Characteristics Based on the Generalized Dynamic Wake Theory |
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| Authors: | SHI Yong-jie ZHAO Qi-jun XU Guo-hua |
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| Institution: | SHI Yong-jie,ZHAO Qi-jun,XU Guo-hua(Nation Key Laboratory of Rotorcraft Aeromechanics,Nanjing University of Aeronautics , Astronautics,Nanjing,210016) |
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| Abstract: | In this paper,a numerical method based on the Peters-He generalized dynamic wake theory is established to predict the rotor unsteady aerodynamic loading in forward flight.The 2-D Leishman-Beddoes unsteady aerodynamic theory is employed to account for the effects of compressive and dynamic characteristics on amplitude and phasing of aerodynamic loading.In order to calculate the rotor unsteady aerodynamic characteristics,a uniform state-space scheme solved by the fourth-order Runge-Kutta method is developed t... |
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| Keywords: | rotor aerodynamic characteristic dynamic wake theory helicopter |
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