| 基于时间步进自由尾迹的旋翼总距突增气动响应分析 |
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| 引用本文： | 邓景辉,谭剑锋,张呈林.基于时间步进自由尾迹的旋翼总距突增气动响应分析[J].空气动力学学报,2011,29(2). |
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| 作者姓名： | 邓景辉 谭剑锋 张呈林 |
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| 作者单位： | 直升机旋翼动力学国家级重点实验室,江西景德镇,333001 |
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| 摘 要： | 自由尾迹的桨叶气动模型中,考虑了由于桨叶预扭导致尾随涡不在同一个平面对控制点诱导速度的影响,翼型气动模型采用Leishman-Beddoes非定常气动模型,并推导得到操纵下的桨叶挥舞运动方程。采用二阶精度时间步进格式,耦合桨叶气动模型、挥舞运动方程,构建时间步进自由尾迹算法。而后计算旋翼尾迹在操纵条件下的变化历程,得到旋翼的气动响应。通过计算结果与实验数据的对比,验证方法的可行性,并分析操纵速率、预扭对气动响应的影响。
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| 关 键 词： | 自由尾迹 总距突增 旋翼 气动响应 时间步进 预扭 |
Analysis of rotor dynamic response during ramp increased collective pitch by time-step free wake |
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| DENG Jing-hui,TAN Jian-feng,ZHANG Cheng-lin.Analysis of rotor dynamic response during ramp increased collective pitch by time-step free wake[J].Acta Aerodynamica Sinica,2011,29(2). |
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| Authors: | DENG Jing-hui TAN Jian-feng ZHANG Cheng-lin |
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| Institution: | DENG Jing-hui,TAN Jian-feng,ZHANG Cheng-lin (National Key Laboratory of Rotorcraft Aeromechanics,Nanjing University of Aeronautics & Astronautics,Nanjing 210016,China) |
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| Abstract: | The influence of near wake trailers in different planes due to blade twist was accounted into Blade aerodynamic model in free wake.Leishman-Beddoes unsteady aerodynamic model was applied to airfoil model,and flapping equation of blade under manoeuvering was derived.Time-step free wake was established by coupling second-order time accurate algorithm,blade aerodynamic model,blade flapping equation and rotor trim.Then time histories of wake geometry and aerodynamic response were calculated.The time-step method... |
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| Keywords: | free wake ramp increased pitch rotor aerodynamic response time-step pre-twist |
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