内燃叉车排气消声器内流场及温度场数值分析

Numerical analysis of the flow and temperature fields inside an internal combustion forklift exhaust muffler

在排气消声器声学性能的分析中,为了计入气流流速和温度的影响,以某内燃叉车排气消声器为研究对象,基于流场分析理论,利用fluent软件对其内部复杂流场及温度场进行了数值模拟,分析得出消声器内部的速度场和温度场.以消声器内部温度场计算结果为基础,采用Ansys稳态热分析模块,计算得到排气消声器壳体的稳态温度场,并进行消声器壳体温度测量试验.研究结果表明:内燃叉车排气消声器壳体稳态温度场的仿真结果与试验结果在消声器壳体上的位置变化趋势基本吻合,说明了仿真得到的排气消声器壳体温度场可信,排气消声器内部流场及温度场仿真分析正确.

In order to consider the influence of air flow velocity and temperature into the analysis of acoustic performance of exhaust muffler,the complex flow and temperature fields in an internal combustion forklift exhaust muffler was numerically simulated with the fluent software.The velocity and temperature fields were gained.According to the simulation results of the temperature field inside muffler,the steady state temperature field of muffler shell was calculated with Ansys steady-state thermal analysis module. Moreover,the experiment of measuring muffler shell temperature was carried out.The research results show that the simulation results are consistent with experimental results which on the muffler shell,illustrating that simulation results are credible,and then the simulation results of flow and temperature fields inside muffler are correct.