Acoustic Performance Analysis of Impedance Compound Muffler with Aluminum Foam

Abstract:

The common reactive muffler has poor acoustic properties in high frequency, so aluminum foam is applied to the reactive muffler and the impendence compound muffler is designed. The acoustic performance of the muffler is analyzed; the interior sound field of the muffler is modeled and meshed in the ANSYS, then they are imported into SYSNOISE, and imposed reasonable boundary conditions to carry out the analysis of acoustic performance of the muffler. The results show that, compared to reactive muffler, the muffler with aluminum foam has a higher amount of noise reduction and a wider frequency band in middle and high frequency.

• Periodical: Advanced Materials Research (Volume 279)
• Pages: 253-257
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.279.253
• Online since: July 2011
• Authors: Huai Qian Bao, Chang Tian Wang, Jun Li
• Keywords: Acoustic Performance, Aluminum Foam, Muffler, Transmission Loss

References

[1] Michael F. Ashby, LU Tianjian: Metal foams:a survey. Seienee in China(B), 46, 6(2003), pp.521-532.

[2] F. D. DENIA, J. ALBELDA, F. J. FUENMAYOR and A. J. TORREGROSA: Acoustic behaviour of elliptical chamber mufflers. Journal of Sound and Vibration, 241, 3(2001), pp.401-421.

DOI: 10.1006/jsvi.2000.3289

[3] Fan Qianwang: Acoustic Performance Simulation Analysis and Experiment Study for Exhaust Muffler of Four-Cylinder Diesel. Kunming University of Science and Technology, Kunming, (2007), pp.89-102.

[4] Li Zenggang: SYSNOISE Rev5.6. Nation Defense Industry Press, Beijing, (2005), pp.17-56.

[5] H.F: Calculation of Acoustic Characteristics of Automobile Exhaust Muffler and its Optimum Design. Hefei University of Technology, Hefei, (2004), pp.18-34.

[6] M.L. Munjal: Acoustics of Ducts and Mufflers. Wiley-Interscience, New York, (1987), pp.30-67.