中南大学学报（自然科学版）2024，Vol.55Issue(5)：1713-1722,10.DOI:10.11817/j.issn.1672-7207.2024.05.005
高速列车头车流线型区域吹气控制的气动减阻研究
Aerodynamic drag reduction research of air blowing in streamlined area of the head car of high-speed train
摘要
Abstract
In order to explore the feasibility of drag reduction by air blowing in the streamlined area of the head car,the improved delayed detached-eddy simulation method was used to simulate the complex flow around the train at different blowing speeds.The accuracy of numerical simulation was verified by the wind tunnel test.The results show that the flow characteristics around the train can be significantly changed by blowing in the streamlined area of the head car.The airflow generated by the blowing port can avoid the direct impact of the high-speed incoming flow on the train surface.This effectively reduces the pressure drag and friction drag of the head car.Air blowing has relatively small impact on the aerodynamic drag of the middle and tail cars.Air blowing can cause interference effects on the flow around the train,increasing the turbulent kinetic energy in some areas of the train surface.When the blowing velocity increases,the drag reduction ratio and the normalized net power saving of the three-car model increase.When the blowing velocity is 0.2 times of the incoming flow,the drag reduction ratio of the three-car model is 8.44%,and the normalized net power saving is 6.74%.关键词
高速列车/数值模拟/流动控制/气动减阻Key words
high-speed train/numerical simulation/flow control/aerodynamic drag reduction分类
交通工程引用本文复制引用
王鑫然,刘堂红,陈晓栋,夏玉涛,陈争卫,郭子健..高速列车头车流线型区域吹气控制的气动减阻研究[J].中南大学学报（自然科学版）,2024,55(5):1713-1722,10.基金项目
国家重点研发计划项目(2022YFB4301103) （2022YFB4301103）
中国博士后科学基金面上资助项目(2023M743943) （2023M743943）
国家人社部博士后国际交流计划引进项目(YJ20220218) （YJ20220218）
湖南省科技创新计划项目(2022RC3040) （2022RC3040）
国家自然科学基金委员会基础科学中心项目(52388102)(Project(2022YFB4301103)supported by the National Key Research and Development Program of China （52388102）
Project(2023M743943)supported by the China Postdoctoral Science Foundation （2023M743943）
Project(YJ20220218)supported by Ministry of Human Resources and Social Security of China （YJ20220218）
Project(2022RC3040)supported by the Science and Technology Innovation Program of Hunan Province （2022RC3040）
Project(52388102)supported by the China-Fundamental Science Center Project of National Natural Science Foundation) （52388102）
