汽车排气消声器内部流场和声场数值分析

Numerical Analysis of Flow and Acoustic Field Inside the Automobile Exhaust Muffler

应用数值分析方法对某汽车排气消声器进行了流场、温度场和声场分析.在此基础上针对消声器存在的问题对其进行了改进设计.经实验验证,分析结果与实验结果吻合较好,表明数值分析方法能准确的模拟排气消声器性能,是排气消声器性能预测和改进设计的有效方法.

The acoustic field, flow field and temperature field inside a muffler are studied by the numerical analyze method. And an improved design is made aiming at the existent problem. The comparison of the computationally predicted and the experimentally measured transmission loss shows a good agreement. It is indicated that the numerical analysis method can simulate the exhaust muffler~ characteristic accurately. So it is an effective method to predict exhaust muffler＇s performance and have an improved design.