不同数值模拟方法预测消声器传递损失的比较研究  

Comparative Study of Different Numerical Simulation Approaches for the Prediction of Muffler Transmission Loss

作　　者：张昊[1] 郭立新[1] 范威[1] ZHANG Hao;GUO Li-xin;FAN Wei(School of Mechanical Engineering&Automation,Northeastern University,Liaoning Shenyang110819,China)

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819

出　　处：《机械设计与制造》2020年第9期100-103,共4页Machinery Design & Manufacture

基　　金：中央高校基本科研业务专项资金资助项目(02090022118032)。

摘　　要：分别采用三维有限元法(Finite element method,FEM)和三维时域计算流体力学法(Computational fluid dynamics,CFD)对消声器的传递损失进行预测,并将计算结果与文献中的实验数据进行对比,然后从计算结果的准确性,计算耗时和易用性三个方面对这两种数值方法进行比较研究。研究结果表明:无论消声器内是否存在气体流动,两种方法都能够对消声器的传递损失进行合理预测。相比之下,时域CFD法能够获得更加准确的计算结果,但计算时间消耗较长;有限元法计算时间消耗较短,但应用起来较为复杂。In this study,the three-dimensional finite element method(FEM)and the 3D time-domain computational fluid dynamics(CFD)method were employed to calculate the TL,and the predicted results were compared with the experimental data in the published literature.A comparison between the two methods was conducted in three aspects:computational accuracy,time consumption and ease of use.The results indicated that both methods gave reasonable TL predictions for the investigated mufflers,whether or not there was gas flow in the mufflers.The results predicted by the CFD method were more accurate than those predicted by the FEM,but the CFD method was much more time-consuming.By contrast,the FEM was much faster but a little cumbersome to use.

关 键 词：消声器 传递损失 气流 三维有限元法 三维时域计算流体力学法 

分 类 号：TH16[机械工程—机械制造及自动化] TK421.6[动力工程及工程热物理—动力机械及工程]