客车发动机舱鼓包罩形状对舱内散热的影响

摘要

针对某前置中型客车行驶过程中出现的发动机舱过热问题，对其机舱鼓包罩后端面形状进行优化设计，并利用CFD软件分别对改进前后发动机舱内流场和温度场进行数值分析。结果表明：发动机舱鼓包罩形状对舱内热空气的流动有明显的影响，设计合理的鼓包罩后端面形状，对改善发动机舱内散热具有一定意义。%To address the overheat problem on driving of a front engine medium bus,optimal design on the rear face shape of bulge cover in the engine compartment is conducted,also numerical analysis on the flow field and temperature field of before and after improvement in the engine compartment is conducted with CFD software.The result show that the shape of bulge cover affects the heat flow in the engine compartment obviously,reasonable shape on the rear face of bulge cover will generate positive effect for the cooling of the engine compartment.