Aeolian tones radiated from flow past two square cylinders in a side-by-side arrangement
Aeolian tones radiated from flow past two square cylinders in a side-by-side arrangement
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DOI：
10.1063/1.2191847
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发表时间：
2006-04
影响因子：
4.6
通讯作者：
O. Inoue;W. Iwakami;N. Hatakeyama
中科院分区：
文献类型：
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作者：
O. Inoue;W. Iwakami;N. Hatakeyama
本文用直接求解二维非定常可压缩Navier-Stokes方程的方法研究了低马赫数均匀流场中并列放置的两方柱的声辐射。特别注意的效果，两个圆柱之间的间距上的声音的产生机制。结果表明，声压场以及流场表现出不同的功能，根据间距;六种不同的唤醒模式（非同步，反相和同相同步，触发，单钝体，和稳定的模式）进行了观察，并根据唤醒模式，声压场也表现出不同的功能。观察到两种类型的分叉现象，其中两种不同的尾流模式存在相同的间距和两种模式中的任何一种出现取决于初始条件;不同的声压场出现在响应的尾流模式。结果还表明，Curle的偶极子解决方案并不能很好地预测…
The sound generated by two square cylinders placed in a side-by-side arrangement in a uniform flow at low Mach numbers is studied by direct solution of the two-dimensional unsteady compressible Navier-Stokes equations. Special attention is paid to the effect of the spacing between the two cylinders on the generation mechanism of the sound. Results show that sound pressure fields as well as flow fields show different features depending on the spacing; six different wake patterns (nonsynchronized, antiphase and in-phase synchronized, flip-flopping, single bluff-body, and steady patterns) are observed and, depending on the wake pattern, sound pressure fields also show different features. Two types of bifurcation phenomenon are observed where two different wake patterns exist for the same spacing and either of the two patterns appears depending on an initial condition; different sound pressure fields appear in response to the wake patterns. Results also show that Curle's dipole solution does not predict well ...