扩张比对扩张式消声器压力损失影响的分析  

Analysis on the Effects of Expansion Ratio on the Pressure Loss of Expansion Muffler

作　　者：邓兆祥[1] 向飞[1] 李沛然[1] 赵世举[1] 

机构地区：[1]重庆大学,机械传动国家重点实验室,重庆400030

出　　处：《汽车工程》2011年第3期231-235,共5页Automotive Engineering

基　　金：重庆市科技攻关重点项目(CSTC,2008AB6108)资助

摘　　要：通过试验验证了所建的CFD模型,采用CFD软件ANSYS CEX对扩张式消声器进行了数值分析,探讨了各结构参数对压力损失的影响。结果表明,每一个确定结构的扩张式消声器都存在一个压力损失为最大的临界扩张比,扩张腔长度越大、进出口管径越小,则临界扩张比越大。A computational fluid dynamics（CFD） model for expansion muffler is built and verified by test,on which a numerical analysis is conducted by using CFD software ANSYS CEX to investigate the effects of various structural parameters on the pressure drop of expansion muffler.The results show that there is a critical expansion ratio,where the pressure drop reaches a peak value,for every expansion muffle of definite structure.The critical expansion ratio increases with the rise in length of expansion chamber and the reduction in diameter of inlet and outlet tubes.

关 键 词：扩张式消声器 扩张比 压力损失 计算流体力学 

分 类 号：U464.134[机械工程—车辆工程]