| 流体通过二维振动翼型的声辐射研究 |
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| 引用本文： | 刘晓宙, 缪国平, 余志新, 刘应中. 流体通过二维振动翼型的声辐射研究[J]. 声学学报, 2004, 29(2): 122-130. DOI: 10.15949/j.cnki.0371-0025.2004.02.005 |
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| 作者姓名： | 刘晓宙 缪国平 余志新 刘应中 |
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| 作者单位： | 南京大学声学所,近代声学国家重点实验室,南京,210093;上海交通大学船舶与海洋工程学院,上海,200030 |
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| 摘 要： | 推导有均流时二维运动物体的声辐射公式,研究了粘性流体通过二维翼型的声辐射。数值计算结果表明:在不同雷诺数时,声压随时间的变化不同;小雷诺数时,具有规则性,而大雷诺数时,具有非规则性,这是由于多个涡之间的相互作用而引起的;流体通过绕弹性中心的振动翼型引起的声辐射大于流体通过固定翼型的声辐射,单级子项对声场的贡献不容忽略。
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| 收稿时间： | 2002-06-27 |
| 修稿时间： | 2002-10-14 |
Research on the sound generation by flow past vibrated aerofoil in two dimensions |
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| LIU Xiaozhou, MOU Guoping, YU Zhixin, LIU Yingzhong. Research on the sound generation by flow past vibrated aerofoil in two dimensions[J]. ACTA ACUSTICA, 2004, 29(2): 122-130. DOI: 10.15949/j.cnki.0371-0025.2004.02.005 |
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| Authors: | LIU Xiaozhou MOU Guoping YU Zhixin LIU Yingzhong |
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| Abstract: | The formulas for sound generation by uniform flow past moving body in two dimensions are derived. The sound generation induced by the flow past aerofoil in two dimensions is studied. The results show that the sound pressure changing with time is different at different Reynolds numbers. It is regular at small Reynolds number while it becomes irregular at large Reynolds number, which due to interaction among different vortex at large Reynolds numbers. The amplitude induced by flow past vibrated aerofoil is larger than that induced by flow past stationary aerofoil. The contribution of monopole to the sound is not negligible. |
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