摘要
应用计算流体力学方法,采用重叠网格的策略,对直道行驶的简化模型进行瞬态数值模拟研究,然后进行风洞试验验证。在此基础上,对弯道行驶状态下简化模型周围流场的瞬态气动特性进行了数值模拟,得到了弯道行驶状态下模型周围的流场分布和气动阻力系数等气动特性,并与直道行驶状态下的结果进行对比分析。结果表明:弯道行驶车辆受到了瞬态侧向力及横摆力矩的作用,并且随着转弯半径的减小,侧向力和横摆力矩急剧增大,行使速度的变化也会带来侧向力和横摆力矩的改变,从而影响车辆的行驶稳定性。本文为进一步研究弯道行驶车辆的瞬态气动特性提供了理论参考。
Computational Fluid Dynamics （CFD） simulation with overset grid is carried out to investigate the transient aerodynamic characteristics of the flow field around a simplified model of straight driving vehicle. Wind tunnel test is conducted to verify the CFD simulation results. Based on this, CFD simulation of the flow field around a turning vehicle is carried out. The aerodynamic drag coefficient and velocity vectors are obtained. The results are analyzed in contrast with the results of straight driving vehicle. The turning vehicle experiences a transient side force and a yawing moment, both of which sharply increase as the turning radius decreases. Both the side force and the yawing moment change with the vehicle speed, which would affect the vehicle stability. This study provides reference for further study of the transient aerodynamic characteristics of turning vehicle.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2015年第1期44-48,共5页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(11102070)
吉林大学基本科研业务费项目
关键词
车辆工程
重叠网格
瞬态数值模拟
弯道行驶
气动特性
vehicle engineering
overset grid
transient numerical simulation
cornering
aerodynamic characteristics
