某纯电SUV气动阻力优化

The Aerodynamic Drag Development of an Electric Vehicle

文章介绍了某纯电车型的气动阻力开发过程,结合CFD仿真和模型风洞试验工具,项目在不同的开发阶段及重点优化区域选取了有限体积法(FVM)、格子玻尔兹曼法(LBM)仿真以及等比例模型风洞试验工具进行分析。在造型前期主题选择阶段以FVM方法评估外造型形体,详细设计阶段增加LBM方法和等比例模型风洞试验评估外造型细节,工程设计阶段以ET风洞试验对气动附件及关键造型特征进行开发,风洞试验结果表明该车型的整车风阻系数达成风阻目标,整车风阻系数降低28%,为后续纯电车型空气动力学开发具有一定借鉴意义。

This article introduces the development process of aerodynamic resistance of a pure electric vehicle model.Combining CFD simulation and model wind tunnel test tools,the project selected finite volume method(FVM)and lattice Boltzmann method(LBM)in different development stages and key optimization areas.Simulation and proportional model wind tunnel test tools for analysis.In the early stage of the theme selection phase,the FVM method was used to evaluate the external shape,the LBM method and the proportional model wind tunnel test were added to the external design details to evaluate the external modeling details,and the ET wind tunnel test was used to develop the pneumatic accessories and key modeling features in the engineering design phase.Wind tunnel test results show that the vehicle’s wind resistance coefficient of this model achieves the wind resistance goal,which has certain reference significance for the subsequent aerodynamic development of pure electric vehicles.