排气消声器不稳定流动模拟与实验  

Unsteady Flow Simulation and Experiment of Exhaust Mufflers for Automobiles

作　　者：姚小刚[1] 程昌圻[1] 

机构地区：[1]北京理工大学

出　　处：《内燃机学报》1990年第2期118-124,共7页Transactions of Csice

摘　　要：目前车用排气消声器设计时,一般采用经典声学方法进行消声性能分析,再结合大量实验选优,才最后定型。由于声学法存在的缺点有可能通过消声器的不稳定流动模拟来克服,因此国内外学者已开始探索这一新方法。本文分析了车用消声器的结构,归纳了组成消声器总体的基本元件,建立了不稳定流动的物理模型和计算机求解的算法,编制了通用程序,并且与内燃机循环模拟软件结合,开发了用于消声器性能分析和噪声预测的软件。通过对比实测和计算排气压力波及排气噪声频谱,验证了所设计的物理模型和算法的可靠性,为消声器的分析设计打下了基础。It has attracted much attention of many researchers to apply unsteadyflow simulation to engine exhaust system for performance analysis andexhaust muffler designing.This paper constr(?)cts gas-dynamic models for someimportant muffler elements and proposes computer algorithm.Combined withcharacteristic method,it comes true that,using developed program,both theexhaust noise from exhaust pipe exit and the influence of muffler on engineperformance can be analysed and calculated.Comparisons between calculationand measurement for a gasoline engine show good agreement and confirmthat the muffler models are reasonable.This work can be the basis forfurther analysis of muffler design.

关 键 词：排气 消声器 流动 模拟 车辆 

分 类 号：U464.134.4[机械工程—车辆工程]