| 贯流风机气动噪声数值预估 |
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| 引用本文： | 陈安邦,李嵩,黄东涛.贯流风机气动噪声数值预估[J].清华大学学报(自然科学版),2007,47(2):236-239. |
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| 作者姓名： | 陈安邦 李嵩 黄东涛 |
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| 作者单位： | 清华大学,航天航空学院,北京,100084 |
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| 摘 要： | 通过精细求解二维非定常Reynolds平均的Navier-Stokes方程,数值模拟了贯流风机内部的复杂流场。随后从流场的数值结果中提取出叶片、涡墙和后墙的脉动压力作为声源,进行声场计算。以声学中的Ffowcs Williams-Hawk-ings(FW-H)方程作为出发方程,数值求解贯流风机的噪声场。计算结果表明在贯流风机中,后墙的压力脉动与涡墙的压力脉动是主要的噪声源。该文的数值预估不仅在贯流风机的总体气动性能上与实验测试结果吻合,同时气动噪声场的预估结果也与实验测试结果吻合良好。
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| 关 键 词： | 贯流风机 气动噪声 数值预估 |
| 文章编号： | 1000-0054(2007)02-0236-04 |
| 修稿时间： | 2006年1月10日 |
Numerical analysis of aerodynamic noise in a cross flow fan |
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| CHEN Anbang,LI Song,HUANG Dongtao.Numerical analysis of aerodynamic noise in a cross flow fan[J].Journal of Tsinghua University(Science and Technology),2007,47(2):236-239. |
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| Authors: | CHEN Anbang LI Song HUANG Dongtao |
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| Abstract: | The flow field in a cross flow fan was simulated by solving the 2-D unsteady Reynolds-averaged Navier-Stokes equations. The calculated pressure fluctuations of the blades, vortex wall, and rear wall were then used as noise sources to calculate the sound field. The Ffowcs Williams-Hawkings (FW-H)equation was employed to predict the far field noise caused by these sources. The predictions show that the rear wall and vortex wall sources contribute significantly to the total noise and that both the predicted aerodynamic performance and noise agree well with experimental results. |
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| Keywords: | cross flow fan aerodynamic noise numerical prediction |
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