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.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
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)
关键词
汽车
低阻车身
参数化建模
气动优化
风洞试验
vehicles
low-drag car body
parametricmodeling
aerodynamic optimization
wind tunnel test
