Producing Mechanism on Flow Regeneration Noise from Muffler Element with Inserted Tube

Hai Jun Zhao; Jia Dong Chang; Hai Xia Wang; Qi Li

doi:10.4028/www.scientific.net/AMR.538-541.1977

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 538-541Producing Mechanism on Flow Regeneration Noise...

Producing Mechanism on Flow Regeneration Noise from Muffler Element with Inserted Tube

Abstract:

Structure parameters of muffler element with inserted tube are firstly determined, it is analyzed to the inserted length effecting on sound power of flow regeneration noise and frequency characteristic, and distribution feature of flow velocity and turbulence kinetic energy is explored by numerical computation of flow field. It is shown that flow regeneration noise of muffler element with inserted tube forms according to confined incomplete flow-inject, it presents wide frequency band, and its energy focus on middle and low frequency, especially it is about 600Hz, Strouhal Number is 0.5. When its structure parameters is constant, distribution feature of flow velocity and turbulence kinetic energy doesn’t change with flow velocity, and difference is numerical dimension, and turbulence kinetic energy distributes near inserted tube in wall, this is area occurring flow regeneration noise, so producing mechanism of flow regeneration noise from muffler element with inserted tube is achieved.

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Periodical:

Advanced Materials Research (Volumes 538-541)

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1977-1980

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https://doi.org/10.4028/www.scientific.net/AMR.538-541.1977

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June 2012

Authors:

Hai Jun Zhao, Jia Dong Chang, Hai Xia Wang, Qi Li

Keywords:

Flow Regeneration Noise, Muffler, Muffler Element with Inserted Tube, Producing Mechanism

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References

[1] Deng Z-x, Zhao H-j, Zhao S-j, Li P-r. Producting mechanism of flow noise generation from perforated duct muffler element, Transactions CSICE, 5, 27 (2009). (In Chinese)

Google Scholar

[2] K.R. Holland, P.O.A.L. Davies. The measurement of sound power flux in flow ducts. Journal of Sound and Vibration (2000) 230(4), 915-932.

DOI: 10.1006/jsvi.1999.2656

Google Scholar

[3] P O A L Davies, K R Holland. Flow noise generation in expansion chambers. Proceedings of the Institute of Acoustics, Vol. 26. Pt.2 2004:206-213.

Google Scholar

[4] ZHAO H J, DENG Z X, YANG J, et al. Comparison of numerical methods for calculating transmission loss in inserted ducts muffler and parameters analysis[J]. Chinese Internal Combustion Engine Engineering,2008,29(6):65-69. (In Chinese)

Google Scholar

[5] Selamet, Z.L.Ji. Acoustic attenuation performance of circular expansion chambers with extended inlet/outlet[J]. Journal of Sound and Vibration (1999) 223(2), 197-212.

DOI: 10.1006/jsvi.1998.2138

Google Scholar

[6] S. Bilawchuk, K.R. Fyfe. Comparison and implementation of the various numerical methods used for calculating transmission loss in silencer systems. Applied Acoustics 64 (2003) 903–916.

DOI: 10.1016/s0003-682x(03)00046-x

Google Scholar

[7] A.SELAMET, P. M. RADAVICH. The effect of length on the acoustic attenuation performance of concentric expansion chambers: analytical computational and experimental investigation[J]. Journal of Sound and Vibration, (1997) 201(4), 407-426.

DOI: 10.1006/jsvi.1996.0720

Google Scholar