中南大学学报（自然科学版）2012，Vol.43Issue(9)：3698-3703,6.
车窗对车辆侧向气动性能影响的数值模拟
Influence of window on train side aerodynamic performance by numerical simulation
摘要
Abstract
Using DES based on Spalart-AUmaras equation, the influence of the side windows on lateral aerodynamic performance and the flow field structure was analyzed and calculated. The results show that the side window has great impact on aerodynamic performance. Compared to the aerodynamic coefficients of body with pasted windows, the lateral force coefficient, side force coefficient and overturning moment coefficient of vehicle with sunken windows vary from 0.71, 1.28, -0.27 to 1.20, 1.74, -0.63, respectively. Windows affect the flow field in leeward section. Restrained by the sunken windows, flow velocity over the roof drops and flow separation in the back of the vehicle is weak, which makes the shedding vortexes attracted by the windows where the vortex core lines are more and messy, while the vortex core lines far away are longer and vortexes have large diameter. To the body with pasted windows, the velocity of airflow pasting the roof is higher and flow separation in the leeward area is serious where there are large vortexes and the internal flow velocity is low, and there are many vortexes close to the car-body which are messy and in small size too.关键词
车辆/车窗/DES/气动性能/流场结构Key words
rolling stock/window/DES/aerodynamic performance/flow structure分类
交通工程引用本文复制引用
苗秀娟,高广军..车窗对车辆侧向气动性能影响的数值模拟[J].中南大学学报（自然科学版）,2012,43(9):3698-3703,6.基金项目
国家自然科学基金资助项目(51075401,U1134203) （51075401,U1134203）
