Wavelet Analysis and Numerical Simulation of Jet Noise induced by a Large Caliber Small Arms

被引：0
|
作者：
Zhao X. [1 ]
Zhou K. [1 ]
He L. [1 ]
Lu Y. [1 ]
Li J. [2 ]
机构：
[1] School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu
[2] No.208 Research Institute of China Ordnance Industries, Beijing
来源：
Binggong Xuebao/Acta Armamentarii | 2019年 / 40卷 / 11期
关键词：
Computational aeroacoustics; Computational fluid dynamics; Jet noise; Large caliber small arms; Muzzle brake; Muzzle noise; Wavelet analysis;
D O I：
10.3969/j.issn.1000-1093.2019.11.003
中图分类号：
学科分类号：
摘要：
The aerodynamic characteristics of muzzle noise are studied based on experimental and numerical research on jet noise induced by complex flows discharging from a large caliber small arms with a muzzle brake. The measured noise data are analyzed to distinguish the muzzle shock wave from muzzle impulse noise by the wavelet transform method. The muzzle noise is numerically simulated by a CFD-CAA hybrid method. The feasibility of the proposed method is proven by comparing the simulated results with the test results. In addition, the distribution of shock wave in muzzle brake and the directivity of muzzle noise field are analyzed based on the numerical simulation. The results indicate that the muzzle noise has a wide spectrum with high sound energy and complex components. It is found that the muzzle brake causes the lateral diversion of flow field around the muzzle, thus affecting the distribution of muzzle flow noise. © 2019, Editorial Board of Acta Armamentarii. All right reserved.
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页码：2195 / 2203
页数：8
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