摘要
为了降低风的阻力,对某牵引式重型载货汽车加装了4种不同形式和尺寸的尾板。并采用数值仿真的方法分析了尾板对流场的影响,探索了风阻产生机理和降低原因。仿真工况模拟正常车辆行驶速度25m/s,未考虑侧风影响。计算结果表明:安装4种尾板后风阻系数均有降低,降幅最大为2.8%,获得了较满意的降阻效果。对比分析了4种方案的整车气动阻力系数、流速分布及总压为零等值面的计算结果。研究发现:尾板对车身周围气流的影响集中在货箱尾部,改变了尾流中原有的环形漩涡结构,从而降低了风阻。
Numerical simulation was used to calculate the flow field around a heavy-duty truck. This study attempted to reduce the drag by adding four rear-end panels with different sizes and styles. The influence of the rear-end panels on the flow field was studied, and the mechanism of generation of drag and cause of decrease of drag were investigated. The air velocity was set to 25 m/s without considering crosswind to simulate the real working condition. The results confirm the effectiveness of all the four types of rear-end panels in drag reduction, and a maximal drag reduction of 2.8% was obtained. Analysis suggests that the rear-end panels alter the structure of the ring vortex in the wake flow, thus reducing the drag.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2013年第3期595-601,共7页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(50805062)
吉林大学基本科研业务费项目(450060481062)
关键词
车辆工程
重型载货汽车
尾板
尾流场
环形漩涡
vehicle engineering
heavy-duty truck
rear-end panel
wake flow field
ring vortex
