| 自由空间中点涡粘性衰减过程中的声辐射及其频谱分析 |
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| 引用本文： | 高霄鹏,缪国平,尤云祥. 自由空间中点涡粘性衰减过程中的声辐射及其频谱分析[J]. 船舶力学, 2004, 8(5): 125-132 |
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| 作者姓名： | 高霄鹏 缪国平 尤云祥 |
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| 作者单位： | 上海交通大学,上海,200030;上海交通大学,上海,200030;上海交通大学,上海,200030 |
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| 摘 要： | 本文利用奥辛涡(Oseen vortex)模型,应用涡声理论研究了自由空间中点涡粘性衰减过程中的声辐射问题,并在此基础上进行了频谱分析.经分析知点涡粘性衰减过程的外声场具有窄频段、频谱分布曲线峰值特征明显等特点,其远场声压及其频谱分布情况与粘性系数有一定的关联.
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| 关 键 词： | 噪声 流噪声 涡声理论 奥辛涡 点涡 |
| 文章编号： | 1007-7294(2004)05-0125-08 |
| 修稿时间： | 2003-12-16 |
Sound radiation and its spectrum analyses of a point vortex in free space |
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| GAO Xiao-peng,MIAO Guo-ping,YOU Yun-xiang. Sound radiation and its spectrum analyses of a point vortex in free space[J]. Journal of Ship Mechanics, 2004, 8(5): 125-132 |
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| Authors: | GAO Xiao-peng MIAO Guo-ping YOU Yun-xiang |
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| Abstract: | Oseen vortex model is used to study the sound radiation of viscous attenuation of point vortex in free space,its spectrum is also presented in this paper.It is shown that the outer sound field of above has some characters including narrow frequency distribution,and one evident peak etc.It is also pointed out that the outer sound field has some relationship with viscous coefficient of fluid. |
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| Keywords: | acoustic fluid noise vortex sound theory Oseen vortex point vortex |
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