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首页> 外文会议>Vehicle aerodynamics, 2012. >Numerical Flow Simulation for a Generic Vehicle Body on Wheels with Variable Underbody Diffuser
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Numerical Flow Simulation for a Generic Vehicle Body on Wheels with Variable Underbody Diffuser

机译：可变底盘扩散器的车轮上通用车身的数值流模拟

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Being a continuous subject of research, the authors present in this paper new aspects and results concerning the relevance of diffusers in vehicle aerodynamics. In the first stage of investigation, a generic car model with wheels was considered, starting from the Ahmed body, and the effect of adding wheels to the body was studied. Latter, the influence of diffuser length and angle, within ranges relevant to hatchback passenger cars, on drag and lift was studied for the Ahmed body with wheels. The results show that the addition of wheels and wheelhouses results in increasing of drag and lift due to the vortices which originate from the wheels. Concerning the underbody diffuser, the results show that both drag and lift of the bluff bodies with wheels are reduced with increasing diffuser length for moderate values of angle, up to six degrees for the cases studied.
机译：作为研究的一个连续主题，作者在本文中提出了与扩散器在车辆空气动力学中的相关性的新方面和新成果。在研究的第一阶段，从艾哈迈德（Ahmed）车身开始，考虑了带有车轮的通用汽车模型，并研究了向车轮添加车轮的效果。后来，研究了带轮的艾哈迈德车身在与掀背式乘用车有关的范围内，扩散器长度和角度的影响对阻力和升力的影响。结果表明，由于车轮产生的涡流，车轮和操舵室的增加导致阻力和升力的增加。关于车身底部扩散器，结果表明，对于中等角度，随着车轮扩散器长度的增加，阻力变小和举升都减小，对于所研究的情况，最大可达六度。

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