尾板对重型载货汽车尾部流场的影响  

Numerical simulation of the influence of rear-end panels on the wake flow field of a heavy-duty truck

作　　者：胡兴军[1] 李腾飞[1] 王靖宇[1] 杨博[1] 郭鹏[1] 廖磊[1] 

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130022

出　　处：《吉林大学学报（工学版）》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)

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.

关 键 词：车辆工程 重型载货汽车 尾板 尾流场 环形漩涡 

分 类 号：U461.1[机械工程—车辆工程]