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

doi:10.3969/j.issn.1000-1093.2019.11.003

Abstract

Abstract: 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. Key

Key words: largecalibersmallarms, muzzlenoise, jetnoise, muzzlebrake, computationalaeroacoustics, computationalfluiddynamics, waveletanalysis

CLC Number:

TJ202

ZHAO Xinyi， ZHOU Kedong， HE Lei， LU Ye， LI Junsong. Wavelet Analysis and Numerical Simulation of Jet Noise induced by a Large Caliber Small Arms[J]. Acta Armamentarii, 2019, 40(11): 2195-2203.

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第40卷
第11期2019 年11月兵工学报ACTA
ARMAMENTARIIVol.40No.11Nov.2019

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