Aerodynamic noise analysis of 6MF-30 portable pneumatic extinguisher.

CHEN Xiao-xuan; LI Wen-bin.

doi:10.13332/j.1000-1522.20160102

Journal of Beijing Forestry University > 2016 > 38(12): 113-120. > DOI: 10.13332/j.1000-1522.20160102

CHEN Xiao-xuan, LI Wen-bin.. Aerodynamic noise analysis of 6MF-30 portable pneumatic extinguisher.[J]. Journal of Beijing Forestry University, 2016, 38(12): 113-120. DOI: 10.13332/j.1000-1522.20160102

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Aerodynamic noise analysis of 6MF-30 portable pneumatic extinguisher.

School of Technology, Beijing Forestry University, Beijing, 100083, P. R. China.

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Received Date: March 27, 2016
Published Date: December 30, 2016

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Abstract

Abstract

Portable pneumatic extinguisher is one of the most important equipment for forest fire-fighting in China. But the noise of portable pneumatic extinguisher may have serious physiological and psychological effects on operators. Simulation via FLUENT and noise test experiment were carried out to determine the position of noise source. In addition, several suggestions about noise reduction of portable pneumatic extinguisher were given. The results indicate that acoustic field could be computed via two-dimensional model when large eddy simulation and Flowcs-Williams/Hawkings equation are used; the muffler should be considered during noise simulation; the main aerodynamic noise sources are impeller and vortex tongue; air duct noise contributing to the total noise is minimal; it is suggested that increasing air director could reduce parotic noise caused by working machine.
- aerodynamic noise,
- FLUENT software,
- simulation

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References (53)

References

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Aerodynamic noise analysis of 6MF-30 portable pneumatic extinguisher.

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