汽车外流场分析以及流线型改进  

External flow field analysis and streamlined improvement of a car

作　　者：刘进[1,2] 蒋慧略 刘波 杜大伟[1] LIU Jin;JIANG Hui-lue;LIU Bo;DU Da-wei(Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology, Institute of Oceanographic Instrumentation, Qilu University of Technology(Shandong Academy of Sciences),Qingdao 266001,China;Shandong Technological Center of Oceanographic Instrumentation,Qingdao 266001,China)

机构地区：[1]齐鲁工业大学(山东省科学院)山东省科学院海洋仪器仪表研究所,山东省海洋环境监测技术重点实验室,山东青岛266001 [2]山东省海洋仪器仪表科技中心,山东青岛266001

出　　处：《山东科学》2020年第3期87-92,共6页Shandong Science

摘　　要：以某一微型汽车为原型,进行了汽车三维外流场气动特性数值模拟研究。通过对原车与改进流线型车在不同速度下的压力场的分析,以及对气动阻力值的比较,发现正常行驶速度20 m/s以及极限行驶速度50 m/s下,改进流线型车的压力分布都得到了有效改善。汽车的气动阻力在20 m/s时减阻率为6.67%,在50 m/s时依旧能减阻4.55%。改进后的汽车可以有效降低汽车气动阻力值,提升汽车的动力性和燃油经济性。Based on a miniature car as a prototype,a numerical simulation of the aerodynamic characteristics of the car's three-dimensional external flow field is carried out.By analyzing the pressure field between the original car and the improved streamlined car at different speeds,and comparing the aerodynamic drag values.The results show that the pressure distribution of the improved streamlined car has been effectively improved at the normal driving speed of 20 m/s or the limiting driving speed of 50 m/s.The aerodynamic drag of the car is 6.67%at the normal driving speed of 20 m/s,and it can still reduce the resistance by 4.55%at the limiting driving speed of 50 m/s.The improved car can effectively reduce the aerodynamic drag value,and improve the power and fuel economy of the car.

关 键 词：数值模拟 外流场 流线型 气动阻力 燃油经济性 

分 类 号：TH138[机械工程—机械制造及自动化]