Performance Analysis of Improved Vehicle Muffler

In this paper, the engine model is built and the boundary parameters of specified conditions are gotten by using GT-SUITE software. The acoustic performance and fluid dynamics are analyzed by means of GT-POWER software and CFX module of ANSYS software. The original muffler is evaluated by searching the transmission loss and pressure loss. Based on the simulation results and muffler theory, the relevant parameters and layout of the original muffler structure are improved. Two different improved schemes are put forward, through the obtained acoustic data and the hydrodynamic performance diagram, the mufflers of two schemes are evaluated respectively. The results show that the improved schemes are feasible to enhance the performance of muffler and noise elimination effects in high frequency performs are  well. DOI: http://dx.doi.org/10.5755/j01.mech.24.5.17784