Analysis and Improvement on Acoustic Performance of Muffler with the Consideration of Temperature and Flow Velocity

Abstract:

Aiming for the acoustic performance of expanded-muffler, the acoustic fields, flow field, temperature field and flow regenerated noise inside the expanded-muffler were studied. Furthermore, with the consideration of temperature and flow velocity, the influence of temperature and flow velocity on acoustic performance was obtained. Based on the research, the acoustic performance of an exhaust muffler was studied. By adjusting the structural parameters, without affecting the engine output power, the insertion loss of muffler has average increased by 5.1 dB (A).

• Periodical: Advanced Materials Research (Volumes 875-877)
• Pages: 1143-1147
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.875-877.1143
• Online since: February 2014
• Authors: Yi Xiang Hu, Shun Ming Li, Qing Liu
• Keywords: Acoustic Performance, Flow Velocity, Muffler, Temperature, Transmission Loss

References

[1] Dayou Ma: The Manual of Noise and Vibration Control (China Machine Press, Beijing 2002). (In Chinese).

[2] Yuanyuan Zhang, Shunming Li, Yansong He, et al. Journal of Vibration and Shock. Vol. 30 (2011): p.263. (In Chinese).

[3] Yoshioka T, Adachi T, Butsuen T, et al. JSAE Review, Vol. 20 (1999): p.70.

[4] Hongliang Dong, Zhaoxiang Deng, Fei Lai. Journal of Vibration Engineering. Vol. 22 (2009): p.70. (In Chinese).

[5] Lin He, Haichao. Zhu, Xiaojun Qiu, et al: Acoustic theory and engineering applications (Science Press, Beijing 2006). (In Chinese).

[6] Yanyan Zuo. Zhenjiang. Jiangsu University. 2010. (In Chinese).