摘要
为了优化牵引列车的风动阻力系数,研究了挂车尾部扰流板、侧裙板等减阻附件及驾驶室与货箱连接间隙调整对阻力系数降低的作用,并考虑了无风条件下实际行驶过程中地面与车体相对运动和车轮受压形状改变对阻力的影响。运用CFD分析软件与风洞试验、滑行试验,在不同减阻附件安装情况下,分析了T7H牵引列车的车身绕流特性与阻力系数的变化。研究结果表明:主车和挂车连接处、尾部及底盘减阻附件的安装可以减弱货箱前部气流分离和尾部涡量,从而降低牵引列车阻力系数。在100 km/h速度下,安装减阻附件后的牵引列车阻力系数最高可降低20.2%,最小值可达到0.486。
To optimize the drag coefficient of tractor-trailer, the effect of rear spoilers, aerodynamic skirts and connection gap between cab and trailer was tested, in which the relative motion between tractor and road and the pressed deformations of tires in real running under windless conditions were considered. Computational fluid dynamics software and wind tunnel experiment and slid experiment were carried out to investigate the aerodynamic characteristics around the tractor and the drag coefficients of tractor with different attaching skirts and adjustment of connection gap. Analysis result shows that rear ring vortex and front airflow separation of packing case can be reduced by attaching skirts, such as linking seals and rear spoilers, thus drag coefficient is reduced. At the speed of 100km/h,drag coefficient decreases by 20.2%, its minimum value is 0.486.
出处
《农业装备与车辆工程》
2015年第7期71-75,共5页
Agricultural Equipment & Vehicle Engineering
关键词
牵引列车
风阻特性
CFD分析
连接间隙
减阻附件
tractor-trailer
aerodynamic characteristics
CFD analysis
connection gap
aerodynamic accessories
