| 纵列式直升机双旋翼流场特性的自由尾迹分析 |
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| 引用本文： | 黄水林,徐国华,招启军.纵列式直升机双旋翼流场特性的自由尾迹分析[J].空气动力学学报,2008,26(4). |
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| 作者姓名： | 黄水林 徐国华 招启军 |
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| 作者单位： | 南京航空航天大学航空宇航学院,江苏南京,210016 |
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| 摘 要： | 将旋翼尾迹模型与旋翼配平模型进行耦合求解,建立了一个分析纵列式双旋翼流场的迭代计算方法.为充分模拟双旋翼的干扰影响及桨尖三维效应,使用了畸变的自由尾迹模型,桨叶模型则采用升力面/涡格方法.应用该耦合方法,计算分析了纵列式直升机双旋翼在干扰状态下的尾迹结构及旋翼重叠区域的流场特性,并与单旋翼做了比较.计算表明,悬停时,纵列式双旋翼重叠区下方的下洗速度大于单副旋翼的诱导速度,但小于两副旋翼诱导速度的简单迭加;前飞时,随飞行速度的增大,尾迹重叠区域减小,两副旋翼相互间的干扰也逐渐减弱.
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| 关 键 词： | 自由尾迹 纵列式双旋翼 气动干扰 流场 直升机 |
Free wake analysis on flow field of twin rotors for tandem helicopter |
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| HUANG Shui-lin,XU Guo-hua,ZHAO Qi-jun.Free wake analysis on flow field of twin rotors for tandem helicopter[J].Acta Aerodynamica Sinica,2008,26(4). |
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| Authors: | HUANG Shui-lin XU Guo-hua ZHAO Qi-jun |
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| Institution: | HUANG Shui-lin,XU Guo-hua,ZHAO Qi-jun(National Key Laboratory of Rotorcraft Aeromechanics,Nanjing University of Aeronautics , Astronautics,Nanjing 210016,China) |
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| Abstract: | An iterative computational method in which a rotor free-wake model is coupled with a rotor trim model has been developed for the prediction of flow field between the twin rotors of a tandem helicopter.In order to simulate the aerodynamic interaction of rotors and 3-D blade-tip effects better,the analytical method used a distorted free-vortex wake model and a lifting-surface/vortex-lattice blade aerodynamic model.Using the coupled method,the aerodynamic interactions between the tandem rotors were calculated ... |
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| Keywords: | free wake tandem twin rotors aerodynamic interaction flow field helicopter |
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