Beat of sound generated by flow past three side-by-side square cylinders
Beat of sound generated by flow past three side-by-side square cylinders
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DOI：
10.1063/1.2714080
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发表时间：
2007-04-01
影响因子：
4.6
通讯作者：
Suzuki, Yuji
中科院分区：
文献类型：
--
作者：
Inoue, Osamu;Suzuki, Yuji
本文通过直接求解二维非定常可压缩Navier-Stokes方程，研究了低马赫数均匀流场中三个并排方柱的声辐射。特别注意的是，三个圆柱之间的间距的声音的产生机制的影响。结果表明，在两个并排的圆柱体的情况下，声压场以及流场显示不同的功能取决于间距;五种不同的模式（弱相互作用，对称偏置，同相同步，翻转，和单钝体图案）在这项研究中观察到。在三个圆柱体的情况下，与两个圆柱体的情况相反，当间距相对较大时观察到声音的拍频，因此三个圆柱体之间的流动干扰较弱。
The sound generated by three 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 three cylinders on the generation mechanism of the sound. Results show that, as in the case of two side-by-side cylinders, sound pressure fields as well as flow fields show different features depending on the spacing; five different patterns (weakly interactive, symmetric biased, in-phase synchronized, flip-flopping, and single bluff-body patterns) are observed in this study. In the case of three cylinders, in contrast to the case of two cylinders, a beat of sound is observed when the spacing is relatively large and thus flow interference among the three cylinders is weak.