摘要
为了研究侧风条件下车辆行驶对交通安全的影响。以某轿车1∶5模型为算例,采用了移动地面模拟轿车相对地面的运动和旋转壁面模拟车轮转动的方法,进行了侧风角分别为0、5、10、15°和30°及车轮转动和静止情况下的数值模拟。输出了车身附近和转动车轮附近的流线、纵向对称面和左方前轮的压力曲线和部分车身表面摩擦力分布情况。对比分析了各侧风状态下的侧向力系数变化情况。研究结果表明:随着侧风角的增大侧向力迅速增大;转动车轮条件下的气动阻力较低,计算精度较高,基本与试验情况吻合。
To study the effect of cmsswind on the traffic safety, taking a 1/5 model of a saloon car as an example, the turbulent flow field of the car platoon with flow-deviation angles of 0, 5, 10, 15, 30° respectively with stationary wheels and rotating wheels was numerically simulated where moving ground and rotating wall were used to simulate the rotating wheel effect. The surface shear force distri- bution under some condition was presented. The streamlines near the saloon body and near the wheels were shown under the conditions mentioned above. The pressure curves of the longitudinal symmetrical section and the front-left wheels section were shown in all the crosswind flow fields.The side force coefficient of all the crosswind flow-fields with rotating wheels and stationary wheels were analyzed and discussed.The results showed that the side force increased rapidly with the growth of flow-deviation angles and the drag reduced with rotaring wheels as to this ear and the precision of numerical simulation with rotating wheels was better than that of stationary wheels which basically agreed with the test.
出处
《公路交通科技》
CAS
CSCD
北大核心
2006年第2期147-150,共4页
Journal of Highway and Transportation Research and Development
基金
国家自然科学基金资助项目(60222207)
吉林大学"9852工程"汽车工程科技创新平台资助项目
关键词
侧风
转动车轮
数值模拟
汽车空气动力学
气动力
Crosswind
Rotatingwheels
Numerical simulation
Vehicle aerodynamics
Aerodynamic force
