摘要
高速行驶时,汽车的阻力是汽车造型设计时考虑的一个重要指标.为了研究不同车窗角度对汽车空气动力特性的影响,以国产某轿车为原型,按1∶5进行模型简化,并对前窗角分别为20,°30°和45°的汽车模型进行了实验研究,得到了该模型的阻力系数和升力系数结果.结果表明:阻力系数和升力系数与前车窗角度并非线性关系,具有最佳气动特性的模型是前窗角度为30°的模型,此时的气动阻力系数在研究的3个前窗角度中最低,而升力系数差别较小.
Automobile resistance at high speed is an important indicator at modeling design of automobile. In order to study the effect of the different angles of front window on the automobile dynamic performances, experimental study has carried on the car model with the front window angle of 20°, 30° and 45° respectively. The model is simplified and scaled 1 ： 5 of the real car. Analyzing result indicates that the optimal front window angle is 30° because the flow resistance coefficient is nonlinear with the front window angle and reaches the lowest value at 30°. There is little difference of the lift coefficient at the above three angles.
出处
《中北大学学报（自然科学版）》
CAS
北大核心
2009年第2期115-117,共3页
Journal of North University of China(Natural Science Edition)
关键词
汽车
动力性能
前窗角
阻力系数
automobile
dynamic performances
front window angle
coefficients of flow resistance
