| 横掠二维串列双圆柱绕流气动噪声的数值模拟 |
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| 引用本文： | 赵良举,杨南奇,吴朵,苏成功.横掠二维串列双圆柱绕流气动噪声的数值模拟[J].重庆大学学报(自然科学版),2009,32(8):943-949. |
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| 作者姓名： | 赵良举 杨南奇 吴朵 苏成功 |
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| 作者单位： | 重庆大学动力工程学院; |
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| 基金项目： | 重庆市自然科学基金资助项目(CSTC2007BB6184);;中国博士后科学基金资助项目(20080460753) |
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| 摘 要： | 对横掠串列双圆柱绕流噪声问题进行数值模拟,首先通过二维大涡模拟(LES)求解非定常不可压缩N-S方程捕获瞬时流场声源数据;然后运用基于Lighthill’s声学类比的FW-H方程及其积分解,计算由流体流动诱发产生的噪声。通过比较不同流速、直径、间距比对绕流流场以及由其产生的气动噪声的影响发现:流速、直径增加,辐射噪声级相应增大;流速增加,旋涡脱落频率增大;不同间距比对圆柱旋涡脱落有一定影响,从而影响到辐射噪声,存在噪声最大的临界间距比;同时辐射声场具有较明显的指向性。
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| 关 键 词： | 串列双圆柱 气动噪声 大涡模拟 |
Aeroacoustics numerical simulation of flow past tow dimensional two circular cylinders in Tandem arrangements |
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| ZHAO Liang ju,YANG Nan qi,WU Duo and SU Cheng gong.Aeroacoustics numerical simulation of flow past tow dimensional two circular cylinders in Tandem arrangements[J].Journal of Chongqing University(Natural Science Edition),2009,32(8):943-949. |
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| Authors: | ZHAO Liang ju YANG Nan qi WU Duo and SU Cheng gong |
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| Institution: | College of Power Engineering;Chongqing University;Chongqing 400030;P.R.China |
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| Abstract: | The flow mechanism of flowing over two circular cylinders in tandem arrangements is numerically investigated.First,the unsteady incompressible Navier-Stokes equation is solved using two-dimensional large eddy simulation(LES) model in order to capture the flow instantaneous source data.Then both the FW-H equation and its integral solutions based on Lighthill's acoustic analogy are employed to compute the noise generated by fluid flow.Different flow velocity,circle cylinder diameter and spacing ratios are com... |
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| Keywords: | circle cylinders in tandem arrangements aerodynamic noise large eddy simulation |
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