Numerical simulation on jet noise induced by complex flowsdischarging from small caliber muzzle

Wang Yang; Jiang Xiao-hai; Yang Xu-pu; Guo Ze-qing

doi:10.11883/1001-1455(2014)04-0508-05

Volume 34 Issue 4

Sep. 2014

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Article Navigation > Explosion And Shock Waves > 2014 > 34(4): 508-512

Wang Yang, Jiang Xiao-hai, Yang Xu-pu, Guo Ze-qing. Numerical simulation on jet noise induced by complex flowsdischarging from small caliber muzzle[J]. Explosion And Shock Waves, 2014, 34(4): 508-512. doi: 10.11883/1001-1455(2014)04-0508-05

Citation:

Wang Yang, Jiang Xiao-hai, Yang Xu-pu, Guo Ze-qing. Numerical simulation on jet noise induced by complex flowsdischarging from small caliber muzzle[J]. Explosion And Shock Waves, 2014, 34(4): 508-512. doi: 10.11883/1001-1455(2014)04-0508-05

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Numerical simulation on jet noise induced by complex flowsdischarging from small caliber muzzle

doi: 10.11883/1001-1455(2014)04-0508-05

1.
School of Science, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
National Key Laboratory of Transient Physics, Nanjing University of Scienceand Technology, Nanjing 210094, Jiangsu, China
3.
School of Defense Engineering, People's Liberation Army University ofScience and Technology, Nanjing 210007, Jiangsu, China

Funds: Supported bythe National Natural Science Foundation of China (10902052)

More Information

Corresponding author: Wang Yang, wangyangxupu@163.com
Received Date: 2012-10-16
Rev Recd Date: 2013-04-19
Publish Date: 2014-07-25

Abstract

Abstract

In order to investigate the characteristics of muzzle noise, a numerical study on jet noise induced by complex flows discharging from 7.62 mm gun is achieved. Because of the complex flows structure, it is not easy to study muzzle noise by direct simulation of CAA in current level of computational condition. CFD-CAA hybrid method is applied. At first, the muzzle flow is calculated by using LES. Using the obtained data, the jet noise is carried out by using FW-H equation. The feasibility of the numerical method is verified by comparing with the experiment. Then, the jet noise of 7.62 mm gun is numerically studied by using the hybrid method. Based on the numerical results, the jet noise directivity is analyzed and the contour of sound pressure level is also drawn. Results indicate that jet noise is mainly concentrated in the near muzzle region and the maximum jet noise mainly occurs in the range of 30°-60°.
- mechanics of explosion,
- jet noise,
- large eddy simulation,
- small caliber muzzle,
- noise directivity,
- contours of sound pressure level

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References(10)

References

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