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作 者:李春鹏 赵婧 LI Chunpeng;ZHAO Jing(FAW Group Co.,Ltd.,Changchun 130000,China)
机构地区:[1]中国第一汽车集团有限公司
出 处:《汽车工程学报》2019年第6期436-440,共5页Chinese Journal of Automotive Engineering
摘 要:整车气动阻力优化是提升汽车动力性、经济性的重要手段,对燃油车减小油耗,电动车提高续驶里程具有重要意义。某电动SUV在尾翼优化降阻过程中,其悬浮式尾翼方案出现因尾涡结构不稳定导致阻力系数波动的现象,通过计算流体动力学(Computational Fluid Dynamics,CFD)方法对流场进行分析,从而找到导致上述现象的主要原因和优化策略。经优化后的尾翼方案最终实现整车风阻系数降低7.2%,NEDC工况能耗降低2.6%。对SUV车型尾翼降阻优化方案设计具有一定的参考价值。Aerodynamic drag optimization is an important means to improve the power and economy of the vehicle.In the process of optimizing the tail fin of an electric SUV,the opening scheme at the front end of the tail fin led to poor Cd stability and wake instability.By using CFD,the leading causes were analyzed and the optimization strategies were proposed through flow-field analysis.After the tail fin optimization,the Cd was reduced by 7.2% and the energy consumption under NEDC by 2.6%.The paper has a certain reference value for the optimization design of future SUV models with tail drag reduction.
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