张弘韬1，韩继斌2，叶欢1，王浩1，闫伟1
（1.山东大学 能源与动力工程学院，山东 济南250061；2.山推工程机械股份有限公司，山东 济宁 272073）
摘要：为了改善和解决后置发动机客车在行驶过程中动力舱常出现散热效果不好的问题，影响客车性能。通过对格栅进行优化设计，改善进气效果，提升动力舱散热性能。本研究利用Fluent仿真软件对客车不同格栅布置进行了探究，分别将横向进气格栅同侧布置、竖向进气格栅同侧布置和进气格栅两侧布置与客车流场及动力舱进行三维计算分析。对比分析了不同风扇转速和不同车速下，三种进气格栅类型以及布置方式的压力损失，取得了各工况下的压降变化。研究结果表明，竖向前后布置的格栅阻力相对较小。
关键词：进气格栅；压降；CFD；优化
Abstract：While running, the heat
sink of rear engine bus often have poor heat dissipation, which affects the
performance of the bus. Through the optimization of the grille design, the air
intake is improved and the heat dissipation performance of the power cabin is
improved. Using Fluent simulation software, the different grille arrangement of
passenger car was investigated. The horizontal front and rear layout, vertical
front and rear layout, and the inlet grille and passenger car model and power
cabin were calculated and analyzed respectively. Under different cooling fan
speed and different speed, the pressure loss of three inlet grille types and
layouts are compared and analyzed, and the corresponding pressure drop data are
obtained. The results show that the grille resistance of the front and rear
vertical arrangement is relatively small.
Key Words：intake grille；pressure drop；CFD; optimization
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