Study on Pressure Loss for a Muffler Based on CFD and Experiment

In this work we present the research on pressure loss for a muffler with CFD method. Through using CFD technique, at a certain engine velocity, the flow field of a muffler is simulated and computed, and the total pressure distribution of gas flow internal the muffler is analyzed. It is opened out that with the inlet velocity increasing, the total pressure loss becomes higher and higher according to parabola law similarly. Finally, the availability of CFD simulation results is proved by practical test. For the pressure loss of the muffler, the simulation result is 3824.8pa, while the practical test result is 4572.26pa, so taking all the influencing factors into account, the error rate is only 19.54%. At the same time, the practical test also demonstrates that the muffler designed has reached up to the mustard of the whole machine, and has been put into use in this type of excavator.