Research on Relation among Inlet/Outlet Pressure, Pressure Loss and Inlet Velocity of a Complex Resistance Muffler

Abstract:

Simulation models of resistance mufflers with different typical structures were established, through the computational fluid dynamics method, under the conditions of different inlet velocities, by analyzing distribution characteristic of velocity field and pressure field for flows internal the mufflers, a kind of mathematical relation among the inlet velocity, inlet/outlet pressure, and pressure loss was discovered. Through CFD simulation computation and practical measuring tests of above three parameters for practical muffler with complex configurations, the mathematical relation of them was proved to be correct. With the conclusion, while inlet velocity changed, the variable conditions of inlet/outlet pressure and pressure loss for resistance mufflers could be estimated approximately Therefore, the test expense could be saved, and the designing efficiency for mufflers could also be further improved, so it would bring a certain economic benefit,which would be of great significance for energy saving research of mufflers.

• Periodical: Applied Mechanics and Materials (Volumes 477-478)
• Pages: 858-863
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.477-478.858
• Online since: December 2013
• Authors: Jian Hua Fang*, Qiang Ji, Yi Qi Zhou, De Li Zhu
• Keywords: CFD, Complicated Structure, Empirical Formula, Muffler, Pressure Loss

References

[1] Hu X D, Zhou Y Q, Fang J H, CFD Computation of Pressure Loss of Single and Dual - Chamber Resistance Mufflers, China Mechanical Engineering. 24(2006)2567-2572.

[2] Hu X D, Zhou Y Q, Fang J H, et al, Computational fluid dynamics research on pressure loss of cross-flow perforated muffler, Chinese Journal of Mechanical Engineering (English Edition). 2(2007)88-93.

DOI: 10.3901/cjme.2007.02.088

[3] Hu X D, Zhou Y Q, Fang J H, et al, Muffler Structure Optimization Research of Digging Machine Based on CFD, Journal of System Simulation. 13(2007)3126-3129.

[4] Fang J H, Zhou Y Q, Hu X D, et al, CFD Simulation of Exhaust Muffler with Complicated Structures for an Excavator, Transaction s of CSICE. 1(2009)68-73.

[5] Fang J H, Zhou Y Q, Jiao P G, et al, Study on Pressure Loss for a Muffler Based on CFD and Experiment, 2009 International Conference on Measuring Technology and Mechatronics Automation, Changsha, Hunan Province, China, April11-12, 2009, pp.887-890.

DOI: 10.1109/icmtma.2009.357

[6] Fang J H, Zhou Y Q, Hu X D, et al, Research on Pressure Loss and CFD Simulation of t he Insert-pipe Resistance Mufflers, Journal of Wuhan University of Technology (Transportation Science & Engineering). 4(2009)795-798.

[7] Jian-Hua Fang, Yi-Qi Zhou, Xiao-Dong Hu, Li Wang. Measurement and Analysis of Exhaust Noise from Muffler on an Excavator, International Journal of Precision Engineering and Manufacturing. 5(2009)59-66.

DOI: 10.1007/s12541-009-0094-0

[8] GB/T 4760-1995. Acoustics measuring methods for mufflers. Beijing: Standards Press of China. (1995).