低阻车身形体的参数化建模与气动试验  

A Parametric Modeling Method of Low-drag Car Body and Aerodynamic Test

作　　者：韦甘[1] 杨志刚[1] 李启良[1] 

机构地区：[1]同济大学上海地面交通工具风洞中心,上海201804

出　　处：《同济大学学报（自然科学版）》2014年第5期769-772,781,共5页Journal of Tongji University:Natural Science

基　　金：国家"九七三"重点基础研究发展计划(2011CB711203);上海市科学技术委员会重点实验室计划(11DZ2260400)

摘　　要：用控制点和曲线对车身的侧视图、俯视图和横截面图进行参数化,结合试验设计和局部加密的方法对2维车身进行优化得到全局较优解.从2维优化车身出发,构建不带车轮的2个3维车身形体.计算得到它们的气动阻力系数分别为0.057和0.089,可以作为低阻形体为理想车身的相关研究提供参考.缩比模型的风洞试验结果与数值计算结果基本吻合,验证了低阻车身形体参数化建模方法的可行性.The frontal view, top view and cross-sections of low-drag car body were parameterized with control points and curves. Then the two-dimension car body was optimized by design of experiments and local refinement methods. The global optimum results were obtained. Two three-dimension car bodies without wheels were built based on the optimized two- dimension car bodies, and their coefficients of aerodynamic drag were as low as 0. 057 and 0. 089 respectively. They could serve as low-brag basic bodies for the future research of an ideal car. The agreement between test results and numerical results indicates that this parametric modeling method of low-drag car body is feasible.

关 键 词：汽车 低阻车身 参数化建模 气动优化 风洞试验 

分 类 号：U467.13[机械工程—车辆工程]