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近地鱼形钝体气动阻力特性研究
引用本文:朱晖,王凡,杨志刚.近地鱼形钝体气动阻力特性研究[J].同济大学学报(自然科学版),2018,46(6):0804-0810.
作者姓名:朱晖  王凡  杨志刚
作者单位:同济大学上海地面交通工具风洞中心;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;上海汽车集团股份有限公司乘用车公司
基金项目:上海市地面交通工具风洞专业技术服务平台(16DZ2290400),同济大学教学改革研究和建设项目(1700104075)
摘    要:采用数值模拟与风洞试验两种方法,研究以粒突箱鲀为仿生原型的近地鱼形钝体气动阻力特性.结果表明,近地鱼形钝体确为气动低阻形体,其尾部大收缩角的形态特征及尾迹区相对简单的流场结构共同决定了该形体的气动低阻特性;从气动阻力系数、表面压力系数及尾迹区流场结构三方面对比分析,SST湍流模型的预测值与试验值较为接近.

关 键 词:汽车空气动力学    气动低阻    粒突箱鲀    流动机理
收稿时间:2017/7/11 0:00:00
修稿时间:2018/3/21 0:00:00

Aerodynamic Drag Characteristics of a Near Ground Fish Shaped Bluff Body
ZHU Hui,WANG Fan and YANG Zhigang.Aerodynamic Drag Characteristics of a Near Ground Fish Shaped Bluff Body[J].Journal of Tongji University(Natural Science),2018,46(6):0804-0810.
Authors:ZHU Hui  WANG Fan and YANG Zhigang
Institution:Shanghai Automotive Wind Tunnel Center, Tongji University, Shanghai 201804, China; Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Tongji University, Shanghai 201804, China,Passenger Vehicle Company, SAIC Motor Co. Ltd., Shanghai 201804, China and Shanghai Automotive Wind Tunnel Center, Tongji University, Shanghai 201804, China; Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Tongji University, Shanghai 201804, China
Abstract:By using wind tunnel test and numerical simulation, the aerodynamic drag performance of a near ground fish shaped bluff body originated from ostracion cubicus was studied. The results indicate that the near ground bluff body is actually low aerodynamic drag, whose characteristic is determined by the large boat tailing angle of the model and the relatively simple vortex structure in the wake. Compared with the CD, Cp and wake structure captured by the simulation and test, the most accurate prediction for the aerodynamic performance is achieved by using the SST turbulence model.
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