摘要
使用商业的CFD软件,应用其提供的滑动交界面和动网格功能对简单外形汽车隧道中会车过程的瞬态空气动力学特性进行了模拟。分析了瞬态空气动力学模拟与稳态空气动力学模拟的异同,研究了简单外形汽车的瞬态空气动力学特性(包括尾流结构和气动力系数)和会车过程中连续的、定性的汽车与空气作用规律。研究结果表明:对汽车进行瞬态空气动力学数值模拟是可行的;两车在会车前后的一段时间内气动力系数会有急剧的变化,有类似正弦函数形状的变化曲线;会车状态的空气动力作用对汽车操纵稳定性有重要影响。
The transient flow field around two simplified shape cars when they meet oppositely side-by-side in tunnel was simulated by means of the sliding interface and the moving mesh features offered by a commercial computational fluid dynamics （CFD） software. The differences between the transient and the steady simulations, the transient aerodynamic characteristics （including the wake structure and the aerodynamic coefficients） of the cars, the interaction between the air flow and the cars under the condition of opposite meet side-by-side were analyzed. It was found that it is feasible to use CFD to simulate the transient aerodynamic phenomenons and the aerodynamic coefficients of the cars change sharply like sinusoidal functions. The aerodynamic forces on the cars when they meet have significant effect on the car handling, stability.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2006年第3期302-306,共5页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金资助项目(60222207)
吉林大学'985工程'资助项目
关键词
汽车空气动力学
计算流体力学
会车
瞬态特性
vehicle aerodynamics
computational fluid dynamics
opposite meet side-by-side
transient character
