摘要
首先,运用FLUENT对标准车进行数值模拟分析,验证了数值模拟的适用性及参数设置的正确性。其次,运用CAD初步设计了微型车的车身,在UG中建立了微型车的三维模型,对模型进行网格划分,将有限元模型导入FLUENT中,计算出车身的阻力系数。在此基础上,就车身局部形状对车身气动阻力系数的影响进行研究,分别得到了不同侧面倾角、背部角、后风窗角及底部上翘角所对应的气动阻力系数,分析了局部造型对车身气动特性的影响,为车身的设计及造型改进提供参考。
Firstly, simulated the aerodynamic drag coefficient of standard car by FLUENT, testified the available of numerical simulation and the exactitude of setting parameter. Secondly, established the three-dimensional model in UG and divided it into finite element model, translated it into FLUENT and worked out the aerodynamic drag coefficient of the model by the numerical simulation, on the base, researched the aerodynamic drag coefficient under different angle of profile, back, rear windscreen, bottom corner, and got the relationship between them. The research provides an important theoretical foundation to optimize aerodynamic styling, which can guide the vehicle design.
出处
《机械》
2011年第8期14-18,共5页
Machinery
关键词
数值模拟
气动阻力系数
侧面倾角
背部角
后风窗角
底部上翘角
numerical simulation
aerodynamics drag coefficient
profile angle
back angle
rear windscreenangle~ bottom corner angle
