三厢轿车多参数气动优化

doi:10.13229/j.cnki.jdxbgxb20170264

吉林大学学报(工学版) ›› 2018, Vol. 48 ›› Issue (3): 670-676.doi: 10.13229/j.cnki.jdxbgxb20170264

三厢轿车多参数气动优化

李启良^1,2, 曹冠宁^1,2, 李璇^1,2, 杨志刚^1,2, 钟立元^1,2

1.同济大学上海地面交通工具风洞中心,上海 201804;
2.同济大学上海市地面交通工具空气动力与热环境模拟重点实验室,上海 201804;

收稿日期:2017-03-22 出版日期:2018-05-20 发布日期:2018-05-20
通讯作者: 杨志刚(1961-),男,教授,博士.研究方向:汽车空气动力学.E-mail:zhigang.yang@sawtc.com
作者简介:李启良(1980-),男,副研究员,博士.研究方向:汽车空气动力学与气动噪声.E-mail:qiliang@tongji.edu.cn
基金资助:
上海市地面交通工具风洞专业技术服务平台项目(16DZ2290400).

Multi-parameters aerodynamic optimization of sedan

LI Qi-liang^1,2, CAO Guan-ning^1,2, LI Xuan^1,2, YANG Zhi-gang^1,2, ZHONG Li-yuan^1,2

1.Shanghai Automotive Wind Tunnel Center,Tongji University,Shanghai 201804, China;
2.Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems,Tongji University,Shanghai 201804,China

Received:2017-03-22 Online:2018-05-20 Published:2018-05-20

摘要/Abstract

摘要： 使用遗传算法开展带内流的车身多参数气动优化,寻找气动性能优异的车身外形。三厢轿车气动阻力系数C_d和进气量的试验和数值仿真结果误差分别约为7%和6%,表明所采用的数值仿真方法正确。比较内流简化模型与真实模型得到进气量和速度云图,可以发现两者差异较小,可以采用内流简化模型进行气动优化。选取车身表面6个关键参数,建立带内流的参数化模型,基于轮盘赌选择法和Taguchi方法的遗传算法开展气动优化,得到了气动阻力系数为0.298的优化模型。对比原始模型与优化模型可以发现,优化模型尾部行李箱盖倾角和离去角均向内收缩。本文所建立的内流简化方法和多参数气动优化方法可为相关车型气动开发提供参考。

关键词: 车辆工程, 三厢轿车, 内流, 参数化模型, 遗传算法, 气动优化

Abstract: A multi-parameters aerodynamic optimization of vehicle body with internal flow is carried out using genetic algorithm. The error of the aerodynamic drag coefficient between the experimental and numerical results is about 6%, indicating that the numerical simulation method is correct. Comparing the obtained intake flow and velocity contour, the difference between the simplified model with internal flow and the real model is small. Therefore, the aerodynamic optimization can be performed using the simplified flow model. Six key parameters of the body surface are selected to build a parameterized model with internal flow. The genetic algorithm based on the roulette wheel selection method and the Taguchi method is used in the aerodynamic optimization. An optimization model with an aerodynamic drag coefficient of 0.298 is obtained. Comparing with the original model, the rear trunk lid dip angle and departure angle obtained with the optimization model both contract inward. The simplified method with internal flow and the multi-parameters aerodynamic optimization method can be used to provide reference for the aerodynamic development of related model of vehicle.

Key words: vehicle engineering, sedan, internal flow, parameterized model, genetic algorithm, aerodynamic optimization

中图分类号:

U467.1

李启良, 曹冠宁, 李璇, 杨志刚, 钟立元. 三厢轿车多参数气动优化[J]. 吉林大学学报(工学版), 2018, 48(3): 670-676.

LI Qi-liang, CAO Guan-ning, LI Xuan, YANG Zhi-gang, ZHONG Li-yuan. Multi-parameters aerodynamic optimization of sedan[J]. 吉林大学学报(工学版), 2018, 48(3): 670-676.

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三厢轿车多参数气动优化

Multi-parameters aerodynamic optimization of sedan

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