| 旋翼平行桨-涡干扰噪声的参数影响 |
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| 引用本文： | 史勇杰,徐国华,招启军.旋翼平行桨-涡干扰噪声的参数影响[J].南京航空航天大学学报,2011,43(2). |
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| 作者姓名： | 史勇杰 徐国华 招启军 |
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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： | 建立了一个新的基于Euler和FW-H方程的旋翼平行桨-涡干扰噪声的计算方法.为减小由于空间离散格式精度和网格密度引起的涡数值耗散,使用了预定涡方法.桨-涡干扰噪声的计算则采用基于声学类比法的FW-H方程.以Kitaplioglu的平行桨-涡干扰试验模型为算例,验证了方法的有效性.在此基础上,分析了干扰距离、涡强、桨尖马赫数和涡旋转方向对桨-涡干扰噪声的影响,并得出结论:增大干扰距离可有效地降低桨-涡干扰噪声,当干扰距离大于数倍弦长时,噪声幅值与干扰距离的平方成反比；涡强仅改变噪声大小,对噪声的脉冲特性无影响；而桨尖马赫数对噪声幅值和方向都有影响,且噪声幅值与马赫数的7次方成正比.
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| 关 键 词： | 旋翼 平行桨-涡干扰 桨-涡干扰噪声 预定涡方法 FW-H方程 Euler方程 |
Parametric Influence on Rotor Parallel Blade-Vortex Interaction Noise |
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| Shi Yongjie
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Xu Guohua
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Zhao Qijun.Parametric Influence on Rotor Parallel Blade-Vortex Interaction Noise[J].Journal of Nanjing University of Aeronautics & Astronautics,2011,43(2). |
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| Authors: | Shi Yongjie Xu Guohua Zhao Qijun |
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| Institution: | Shi Yongjie,Xu Guohua,Zhao Qijun(National Key Laboratory of Rotorcraft Aeromechanics,Nanjing University of Aeronautics & Astronautics,Nanjing,210016,China) |
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| Abstract: | A new numerical method based on Euler and FW-H equations is developed for calculating rotor parallel blade-vortex interaction(BVI) noise.To preserve the convecting vortex without numerical dissipation,which is caused by numerical discretisation scheme and grid density,the prescribed vortex method is employed.The noise prediction is based on the well-known FW-H equation for acoustic pressure.A parametric study is performed to examine the effects of the vortex strength,miss-distance,rotor tip Mach number and ... |
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| Keywords: | rotor parallel blade-vortex interaction blade-vortex interaction noise prescribed vortex method FW-H equation Euler equation |
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