| 基于非结构网格CFD技术的旋翼气动噪声计算方法研究 |
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| 引用本文： | 王阳,徐国华,招启军.基于非结构网格CFD技术的旋翼气动噪声计算方法研究[J].空气动力学学报,2011,29(5). |
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| 作者姓名： | 王阳 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,江苏南京,210016 |
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| 摘 要： | 将基于非结构网格技术的旋翼流场CFD计算方法与基于FW-H和Kirchhoff方程的声学方法相结合,建立了一套既适合于直升机旋翼厚度、载荷和桨-涡干扰噪声,又适合于跨声速高速脉冲噪声的综合计算模型。为提高旋翼流场及桨叶表面气动载荷计算的精度,主控方程的求解采用了三维可压非定常的N-S方程,网格划分则使用非结构运动嵌套网格方法。在噪声计算中,通过FW-H方法计算旋翼的厚度噪声和载荷噪声,并选取能够包含流场非线性区域的旋转面作为Kirchhoff积分面,由Kirchhoff方法计算包含四极子项的高速脉冲噪声。应用该模型,以AH-1旋翼为算例,计算了不同飞行状态下的旋翼气动噪声,并与可得到的试验结果进行比较,验证了方法的有效性。然后,着重对两种声学方法对计算结果的影响进行了对比研究,并分析了旋翼厚度噪声、载荷噪声和四极子噪声的特性。
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| 关 键 词： | 旋翼噪声 非结构网格 Kirchhoff方法 FW-H方法 旋翼 直升机 |
Numerical method for predicting rotor aerodynamic noise based on unstructured-grid CFD technology |
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| WANG Yang,XU Guo-hua,ZHAO Qi-jun.Numerical method for predicting rotor aerodynamic noise based on unstructured-grid CFD technology[J].Acta Aerodynamica Sinica,2011,29(5). |
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| Authors: | WANG Yang XU Guo-hua ZHAO Qi-jun |
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| Institution: | WANG Yang,XU Guo-hua,ZHAO Qi-jun (National Key Laboratory of Rotor Aeromechanics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China) |
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| Abstract: | A comprehensive computational model,coupling the rotor CFD method based on unstructured mesh and the acoustic methods based on FW-H and Kirchhoff equations,is established to calculate the thickness,loading noise and blade-vortex interaction noise as well as the transonic HSI noise of helicopter rotor.In order to improve the calculation accuracy of aerodynamic loading on blade surface,the N-S equations are used to solve the flowfield around the rotor,and the unstructured grid is employed to model blade shape... |
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| Keywords: | rotor noise unstructured grid Kirchhoff method FW-H method rotor helicopter |
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