内插管长度对排气抗性消声器性能的影响  

Effect of insert-tube length on the performance of exhaust reactive muffler

作　　者：戚美[1] 牛华青 陈庆光[1] 栾亨宣[1] 苏美英[2] 

机构地区：[1]山东科技大学机械电子工程学院 [2]烟台南山学院工学院

出　　处：《中国科技论文》2017年第10期1109-1112,共4页China Sciencepaper

基　　金：山东省自然科学基金资助项目(ZR2013EEM017)

摘　　要：提高消声器的声学性能,通常会导致空气动力性能的增大,因此要对消声器的综合性能进行评价。利用COMSOL Multiphysics和FLUENT商业软件,对某汽车排气抗性消声器的综合性能进行研究,分别对其在具有4种不同内插管长度组合情况下的声场和流场进行数值模拟,获得消声器的声压分布特性、传递损失及压力损失,并分析和研究了内插管长度对消声器声学性能和空气动力学性能的影响。模拟结果表明,随着内插管长度的增加,消声器的传递损失在低频段明显提高,且消声器的压力损失有所下降,从而汽车排气抗性消声器的综合性能得到了提高。To improve the acoustic performance of the muffler,the aerodynamic performance is usually increased,and therefore,it is necessary to evaluate the comprehensive performance of muffler.Four automobile exhaust reactive mufflers with different lengths of insert-tube were analyzed to study;the effect of insert-tube length on the acoustic and aerodynamic performance of the mufflers.The sound pressure distribution characteristics,transmission losses and pressure losses of mufflers were numerically simulated by COMSOL Multiphysics and FLUENT.It shows that increasing the insert-tube length not only improves the acoustic performance of the muffler at low frequency,but also decreases the pressure loss to some extent,so the comprehensive performance of the automobile exhaust reactive muffler can be improved.

关 键 词：消声器 声学 空气动力 内插管 传递损失 压力损失 

分 类 号：U464.134.4[机械工程—车辆工程]