摘要
汽车消声器是降低排气噪声的主要装置。近年来随着汽车工业的发展,国际上已经开始对汽车的各个零部件分别加以优化设计,其中利用计算流体力学对消声器的流场进行模拟是消声器设计的一个新动向。但是,对于比较复杂的消声器其内部流场复杂,计算量大,计算往往费时过多。本文利用并行计算机群,克服了硬件的困难,用计算流体力学对一复杂消声器内部流场进行了模拟。消声器以穿孔管为主要内件,共有2080个小孔。模拟结果清楚地反映了孔喷射和腔内涡流等流动现象,计算了多个工况,得到进口流速和背压关系。本文计算结果对消声器的设计有指导意义。
In recent years, there appears a new tendency： the optimization of individual part in vehicle industry. Auto- muffler as the main noise control equipment, simulating the inner flow field with CFD （Computational Fluid Dynamic） is a new trend for the auto-muffler design. However, the computation of complex muffler inner flow field takes much time. In this paper, the parallel cluster is applied to simulate the inner flow field of a complex muffler using CFD, in which the perforated pipe is the main part with 2080 holes. The result of simulation indicates clearly the gas hole emission and vortices in the muffler. By computation of several inflow situations, the relation between inlet velocity and backpressure is acquired. The result of simulation in the paper can be guidance on auto-muffler design.
出处
《天津汽车》
2006年第2期21-24,共4页
Tianjin AUTO
基金
天津市科委科技攻关项目
项目编号:043185111-8
