高速列车车顶-升力翼组合体气动特性  

The aerodynamic characteristics of roof-wing combination of a high-speed train

作　　者：高建勇 张军 倪章松 周鹏 朱彦 王成强 高广军[3] GAO Jianyong;ZHANG Jun;NI Zhangsong;ZHOU Peng;ZHU Yan;WANG Chengqiang;GAO Guangjun(Chengdu Fluid Dynamics Innovation Center,Chengdu 610072,China;CRRC Changchun Railway Vehicles Co.,Ltd.,Changchun 130062,China;Key Laboratory of Traffic Safety on Track,Ministry of Education,School of Traffic&Transportation Engineering,Central South University,Changsha 410075,China)

机构地区：[1]成都流体动力创新中心,成都610072 [2]中车长春轨道客车股份有限公司,长春130062 [3]中南大学交通运输工程学院轨道交通安全教育部重点实验室,长沙410075

出　　处：《实验流体力学》2023年第1期29-35,共7页Journal of Experiments in Fluid Mechanics

基　　金：国家重点研发计划(2020YFA071090406)。

摘　　要：高速列车升力翼通过气动增升实现车体等效减重,为高速列车节能降耗提供了新思路。升力翼气动性能直接影响等效减重效果,研究车顶–升力翼组合体在不同工况下的气动特性对列车升力翼设计具有重要意义。采用计算流体力学方法和k–ε模型进行数值仿真研究,分析了车–翼连接杆对升力翼气动特性的影响,研究了升力翼飞高、来流速度、迎角等设计参数对升力翼气动特性的影响规律。研究结果表明:采用NACA0012翼型剖面的车–翼连接杆对升力翼升力和阻力的影响不超过3.7%;在车顶模型前缘引起的高速气流影响下,随着升力翼飞高增大,冲击升力翼的气流速度减小,升力有减小的趋势,在3倍弦长飞高范围内,不同飞高升力翼的升力差值最大不超过3%;当来流速度增大至90 m/s以上时,升力翼的升力系数和阻力系数分别稳定在1.62和0.61附近;在0°~22°迎角范围内,升力翼升力系数不断增大,迎角大于22°后,升力翼升力系数减小。Adding the aeronautic wing to the high-speed train equivalently reduces its weight through the lift force provided by the wing.Hopefully,the energy consumption of the high-speed train can be reduced.This provides a new concept for the high speed train design.The aerodynamic characteristics of the wing directly affect the weight reduction effects.Therefore,it is important to analyze the aerodynamic characteristics of the wing under different conditions for the design of the train lift wing.The k–εmodel was used in this study for numerical simulation.Firstly,the influence of the connection rod between the wing and the train roof on the aerodynamic characteristics of the lift wing was analyzed.On this basis,the effects of design parameters such as the wing-roof height,the incoming flow velocity and the angle of attack on the aerodynamic characteristics of the wing were studied.The results shows that:the influence of the connection rod on the lift and drag of the wing is less than 3.7%.Due to the high-speed airflow induced by the leading edge of the train roof model,the air velocity impacting on the lift wing decreases with the increase of the flying height of the lift wing,and the lift force tends to decrease.Within 3 times of the chord length height,the maximum lift difference of different lift wings does will not exceed 3%.When the velocity of the incoming flow is up to 90 m/s and larger,the lift coefficient and the drag coefficient of the lift wing were close to near 1.62 and 0.61,respectively.As the angle of attack varies within 0°to 22°,the lift coefficients of the wing increase continuously.However,the lift coefficients decrease when the attack angle is above 22°.

关 键 词：高速列车 升力翼 支撑装置 数值仿真 计算流体力学(CFD) 

分 类 号：U271.91[机械工程—车辆工程]