本文基于鲨鱼皮表面的齿状结构对圆柱壳表面进行改形设计，设计了3种典型仿生圆柱壳结构。采用大涡模拟（LES）结合Lighthill声类比方法对仿生圆柱壳的流噪声进行求解，并讨论了仿生圆柱壳流动噪声的特性和机理，最后对圆柱表面的齿状结构进行了优化。结果表明，仿生圆柱可以降低脉动压力的幅值，同时能够改善尾流流场，减少圆柱尾流涡量，从而起到降噪作用。3种仿生圆柱中，V型仿生圆柱的降噪作用最佳，且V型圆柱的s/h的临界值在2.5左右，s/h>；2.5时，V型仿生圆柱不再具有降噪作用。
Based on the tooth-like structure on the surface of shark skin, the cylindrical shell surface is modified and designed, and a typical bionic cylindrical shell structure is designed. The large vortex simulation (LES) combined with the Lighthill acoustic analogy method is used to solve the flow noise of the bionic cylindrical shell. The results show that the bionic cylinder can reduce the amplitude of the pulsating pressure, while improving the wake flow field and reducing the simulation of the cylindrical wake. Among the measuring cylinders, the V-shaped bionic cylinder has the best noise reduction effect, and the critical value of s/h of the V-shaped cylinder is about 2.5. When s/h> 2.5, the V-shaped bionic cylinder no longer has the noise reduction effect.
2021,43(12): 76-82 收稿日期：2020-10-30
DOI：10.3404/j.issn.1672-7649.2021.12.014
分类号：U661.44
作者简介：黄辉(1993-),男,硕士研究生,研究方向为结构振动、流噪声
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