机械与电子Issue(7)：7-11,5.
汽车相会时外流场数值仿真分析
Numerical Simulation Analysis of External Flow Field of Cars at the Moment of Passing
摘要
Abstract
In the course of study on aerodynamic change and its effect on steering stability and controllability of automobiles in passing,due to multi interaction streams,it is difficult to use traditional methods,such as wind tunnel test and road experimental methods.If the process of passing a vehicle is divided into many time segments,and the segments are simulated with computational fluid dynamics (CFD) method,then the approximate computational results about external flow field will be obtained.Based on the idea,numerical simulation analysis of side force coefficient of wagon-shaped car at the moment of passing,and preliminary discussion of aerodynamic characteristics of correlative situations are presented in the paper,by means of dividing the passing process into many time segments and then simulating external flow field of every time segment through solving three-dimensional,steady and uncompressible N-S equations with finite volume method,this avoids the use of moving mesh,which takes large calculation resource and CPU processing time in calculating.Finally,the result of the side force coefficient of car is presented and coincident well with the experimental data,which shows creditability of numerical simulation methods presented in the paper.关键词
外流场/相会/数值模拟/侧向力系数Key words
external flow field / passing / numerical simulation/ side force coefficient分类
交通工程引用本文复制引用
何忆斌,陈建美,刘孟祥..汽车相会时外流场数值仿真分析[J].机械与电子,2013,(7):7-11,5.基金项目
湖南省科技计划资助项目(2012SK3171) （2012SK3171）
湖南省自然科学基金资助项目(13JJ5038) （13JJ5038）
