Numerical simulation and experimental study on jet noise from a small caliber rifle with a muzzle brake

ZHAO Xinyi; ZHOU Kedong; HE Lei; LU Ye; WANG Jia

doi:10.11883/bzycj-2018-0279

Volume 39 Issue 10

Oct. 2019

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ZHAO Xinyi, ZHOU Kedong, HE Lei, LU Ye, WANG Jia. Numerical simulation and experimental study on jet noise from a small caliber rifle with a muzzle brake[J]. Explosion And Shock Waves, 2019, 39(10): 103201. doi: 10.11883/bzycj-2018-0279

Citation:

ZHAO Xinyi, ZHOU Kedong, HE Lei, LU Ye, WANG Jia. Numerical simulation and experimental study on jet noise from a small caliber rifle with a muzzle brake[J]. Explosion And Shock Waves, 2019, 39(10): 103201. doi: 10.11883/bzycj-2018-0279

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Numerical simulation and experimental study on jet noise from a small caliber rifle with a muzzle brake

doi: 10.11883/bzycj-2018-0279

ZHAO Xinyi^1
,,
ZHOU Kedong^{1
,
,},
HE Lei¹,
LU Ye¹,
WANG Jia²

1.
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
No.208 Research Institute of China Ordnance Industries, Beijing 102202, China

Received Date: 2018-08-08
Rev Recd Date: 2018-11-05
Publish Date: 2019-10-01

Abstract

Abstract

In order to investigate the influence of the muzzle device on the characteristics of muzzle aeroacoustic noise, simulation analysis and experimental research were performed on the jet noise induced by the complex flows discharging from a small caliber rifle with a muzzle brake. A CFD (computational fluid dynamics)-CAA (computational aeroacoustics) hybrid method was applied. The muzzle flow field was calculated by using large eddy simulation and the jet noise was determined by the FW-H (Ffowcs Williams-Hawkings) equation based on the obtained source data. Based on the numerical results, the jet noise directivity was analyzed and the comparison to the experimental results was conducted. Results indicate that the muzzle flow field was changed by the muzzle brake and the directional distribution of the jet noise was also affected. The errors between the calculated and experiment results are less than 9%, therefore the numerical method applied in the paper is feasible. The research result can provide a reference for the prediction of muzzle noise and the design of muzzle brakes.
- jet noise,
- computational aeroacoustics,
- muzzle brake,
- noise directivity

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References(14)

References

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