尾板对重型载货汽车尾部流场的影响

doi:10.7964/jdxbgxb201303007

吉林大学学报(工学版) ›› 2013, Vol. 43 ›› Issue (03): 595-601.doi: 10.7964/jdxbgxb201303007

尾板对重型载货汽车尾部流场的影响

胡兴军, 李腾飞, 王靖宇, 杨博, 郭鹏, 廖磊

吉林大学汽车仿真与控制国家重点实验室, 长春 130022

收稿日期:2012-04-30 出版日期:2013-05-01 发布日期:2013-05-01
通讯作者: 杨博(1980-),男,副教授,博士.研究方向:汽车空气动力学.E-mail:yang_bo@jlu.edu.cn E-mail:yang_bo@jlu.edu.cn
作者简介:胡兴军(1976-),男,副教授,博士.研究方向:汽车空气动力学.E-mail:hxj@jlu.edu.cn
基金资助:
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).

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

HU Xing-jun, LI Teng-fei, WANG Jing-yu, YANG Bo, GUO Peng, LIAO Lei

State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China

Received:2012-04-30 Online:2013-05-01 Published:2013-05-01

摘要/Abstract

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25 m/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.

关键词: 车辆工程, 重型载货汽车, 尾板, 尾流场, 环形漩涡

Abstract: 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.

Key words: vehicle engineering, heavy-duty truck, rear-end panel, wake flow field, ring vortex

中图分类号:

U461.1

胡兴军, 李腾飞, 王靖宇, 杨博, 郭鹏, 廖磊. 尾板对重型载货汽车尾部流场的影响[J]. 吉林大学学报(工学版), 2013, 43(03): 595-601.

HU Xing-jun, LI Teng-fei, WANG Jing-yu, YANG Bo, GUO Peng, LIAO Lei. Numerical simulation of the influence of rear-end panels on the wake flow field of a heavy-duty truck[J]. 吉林大学学报(工学版), 2013, 43(03): 595-601.

参考文献

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[6] 胡兴军, 杨博, 郭鹏, 等.基于底部隔板的厢式货车的气动减阻[J].吉林大学学报:工学版, 2011, 41(增刊2): 108-113. Hu Xing-jun, Yang Bo, Guo Peng, et al. Aerodynamic drag reduction of van based on underbody skirt[J]. Journal of Jilin University (Engineering and Technology Edition), 2011,41(Sup.2):108-113.

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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

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