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Numerical Flow Simulation for a Generic Vehicle Body on Wheels with Variable Underbody Diffuser

机译：具有可变底部扩散器的轮子通用车体的数值流模拟

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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：作为研究的持续主题，作者在本文中存在的新方面和结果，关于车辆空气动力学的漫射器的相关性。在研究的第一阶段，从艾哈迈德的身体开始，考虑了具有轮子的通用汽车模型，并研究将车轮添加到身体的效果。后者，对与车轮的拖车乘用车相关的漫射器长度和角度的影响是为艾哈迈德的车轮进行拖曳和升降机。结果表明，由于源自车轮的涡流，增加车轮和轮椅导致拖曳和升力。关于底部的扩散器，结果表明，随着角度的中等值的漫射长度增加，具有车轮的脱模体的阻力和升降，对于所需的角度，对于所研究的情况，高达六度。

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