| 预测悬停旋翼跨音速流动的一种组合自由层流／CFD方法 |
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| 引用本文： | 曹义华 余志强 等. 预测悬停旋翼跨音速流动的一种组合自由层流／CFD方法[J]. 中国航空学报, 2002, 15(2): 65-71. DOI: 10.1016/S1000-9361(11)60132-5 |
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| 作者姓名： | 曹义华 余志强 等 |
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| 摘 要： | 一种新的组合自由尾流/CFD方法用于悬停旋翼流动的CFD解中以考虑实际尾流的作用。用中描述的尾流分析方法研究了螺旋尖涡的运动。首先从广尾流模型开始，用半经验公式模式化涡核对旋翼尾流的作用；然后在环量收敛和尾迹收敛的条件下完成了自由尾迹计算；最后就用Jameson有限体积龙格-库塔推进格式求解了欧拉方程。所得结果与相关献和实验数据进行了比较。
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| 关 键 词： | 旋翼空气动力学 数值模拟 旋翼激波 尾流模型 尾迹收敛 CFD方法 跨音速流动 悬停旋翼 |
| 收稿时间： | 2001-09-05 |
Combined Free Wake / CFD Methodology for Predicting Transonic Rotor Flow in Hover |
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| Affiliation: | Department of Flight Vehicle Design and Applied Mechanics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
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| Abstract: | A new combined wake / CFD methodology is used to include realistic wake effects in CFD solutions for the rotor flow in hover. The analytical method for predicting the hovering rotor wake is described to investigate the motion of the helical tip vortex. Beginning with the generalized wake model, a Semi-Empirical Correction for the vortex core effect on the rotor wake is made. Then on the condition of circulation and wake geometry convergence, the free wake calculation is carried out. Finally, Euler equations are solved for transonic rotor flow employing Jameson's finite-volume explicit Runge-Kutta time-stepping scheme. The results are compared with the respective references and experimental data. |
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