摘要
采用计算流体力学(CFD)方法,对两辆车超车过程的外部流场进行了数值仿真,以研究超车过程中车辆的空气动力特性。采用有限递增步法来处理超车过程,实现了车辆超车过程的三维流场数值仿真,揭示了两车外部流场相互干扰的流动特性,在以前研究超车过程中横向间距对车辆气动特性影响的基础上,进一步研究了两车纵向相对位置对车辆气动特性的影响规律以及气动力对汽车行驶稳定性的影响,为汽车自动驾驶系统和智能交通系统(ITS)的研究提供了理论依据。
In order to research the automotive aerodynamic characteristics during the overtaking process, Computational Fluid Dynamics (CFD) method was adopted to simulate the external flow field during the overtaking process. "Finite incremental steps" method was adopted to treat the overtaking process, to realize the three-dimensional flow field numerical simulation of vehicle overtaking process and to reveal the interfere characteristics of external flow field of two vehicles. On the basis of the effect of lateral spacing during the overtaking process on the automotive aerodynamic characteristics researched before, the effect of longitudinal relative positions on the vehicle aerodynamic characteristics during the overtaking process and the effect of aerodynamic forces on the driving stability were discussed further, which can provide theory basis for the research on automatic drive system and intelligent traffic system (ITS),so as to ensure safety overtaking.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2007年第5期621-625,共5页
China Mechanical Engineering
基金
国家自然科学基金资助项目(60222207)
"吉林大学‘985工程’项目"资助
关键词
汽车空气动力学
数值仿真
超车
气动特性
automotive aerodynamics
numerical simulation
overtaking
aerodynamic characteristics