FSAE赛车车身外流场优化设计与数值模拟  

Outflow Field Optimization Design and Numerical Simulation of FSAE Racing Car body

作　　者：南琼[1] 应保胜[1] 伍俊杰 谢磊 

机构地区：[1]武汉科技大学汽车与交通工程学院,湖北武汉430081

出　　处：《计算机仿真》2018年第1期126-131,209,共7页Computer Simulation

基　　金：国家级大学生创新创业训练计划项目(201510488007)

摘　　要：针对某型FSAE赛车外流场的气动造型设计与优化展开研究,采用三维建模软件CATIA对赛车车身曲面进行初步设计,总结了车身造型优化设计的方法,并对整车车身、车架、车轮、悬架、座舱、95%百分位人体模型、发动机总成及传动系统进行建模与装配,建立了简化的原车型三维模型及四种相对优化的车身局部改型方案。利用ANSYS Workbench集成的流体分析软件Fluent对原车模型及改型方案进行仿真计算,对比改型前后对整车气动性能的影响,得出赛车车身及周围流场的压力和速度分布情况。结果表明原车型气动升力偏大且局部流场存在紊流,改型后的四种方案在不同程度上使整车气动阻力和升力等气动性能得到改善,对提高赛车操纵稳定性和安全性有重要意义。ABSTRACT：In the paper, the aerodynamic shape design and optimization of outflow are researched for a certain type of Formula SAE, and body surface of racing car was preliminary designed with 3D modeling software CATIA. The method of body shape optimization design was summarized, and the body, frame, wheels, suspension, cabin, 95% percentile of human model, engine assembly and transmission system were modeled and assembled. The simpli- fied original model and four kinds of relative optimization body partial modification schemes were built. The fluid a- nalysis software Fluent integrated in ANSYS Workbench was adopted to simulate original and modification program, and the aerodynamic performance effect of whole vehicle was compared with the original and modification models. Fi- nally, the pressure and velocity distributions for the outflow of racing car body and surrounding were obtained. The results show that the aerodynamic lift of original car is slightly larger and turbulence exists in local outflow, and the modified four schemes can improve the vehicle aerodynamic performance of drag and lift in different degree, which has important significance in improvement of handling stability and security of the racing car.

关 键 词：空气动力学 数值模拟 外流场 车身设计 方案优选 气动性能 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]