摘要
传统优化方法凭借对轿车外流场的分析经验来控制尾翼优化变量并等间隔枚举,通过比较得出最优方案,工作量大且可能遗漏关键样本点.本文以尾翼的翼型及相对车身的位置参数(尾翼攻角、垂向位置和纵向位置)为设计变量,基于DOE试验设计方法确定样本设计变量组合,利用数值模拟方法计算出所确定样本点轿车的气动升力和阻力.通过方差分析以及响应曲面法以使轿车获得最大下压力与阻力比值为优化目标,得到各设计变量的影响因数和最优水平.结果表明:基于试验设计的优化过程更加高效地优化了轿车尾翼的空气动力学性能,具有实际工程应用价值.
Traditional optimization of sedan spoiler was based on experience of flow distribution , control-ling optimization variables and enumerating equidistantly , which had huge amount of work and the risk of missing critical sample points .In this paper , airfoil and position parameters of the sedan spoilers were made as optimiza-tion variables .Sample variable combination was determined by experimental design .Down force and drag force were calculated through CFD numerical simulation .The optimized levels and impact factors of variables were ob-tained by response surface method and ANOVA .The results showed that the optimization based on DOE method can optimize the aerodynamic performance of sedan spoiler more efficiently .A relatively complete system of se-dan spoiler aerodynamic optimization for practical engineering applications was constructed .
出处
《佳木斯大学学报（自然科学版）》
CAS
2014年第3期382-386,共5页
Journal of Jiamusi University：Natural Science Edition
关键词
轿车尾翼
DOE试验设计
空气动力学
优化
sedan spoiler
design of experiment
CFD numerical simulation
aerodynamics
optimization
