Numerical investigation on the aerodynamic drag reduction based on bottom deflectors and streamlined bogies of a high-speed train

作     者：JIANG Chen LONG jn-lan LI Yan-ong GAO Guang-jun FRANKLIN Eze 姜琛;龙金兰;李岩松;高广军

作者机构：State Key Laboratory of Heavy-duty and Express High-power Electric LocomotiveCentral South UniversityChangsha 410075China Key Laboratory of Traffic Safety on Track of Ministry of EducationSchool of Traffic&Transportation EngineeringCentral South UniversityChangsha 410075China National&Local Joint Engineering Research Center of Safety Technology for Rail VehicleCentral South UniversityChangsha 410075China Key Laboratory of Railway Industry of AerodynamicsCentral South UniversityChangsha 410075China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2024年第31卷第9期

页      面：3312-3328页

核心收录：

学科分类：082304[工学-载运工具运用工程] 08[工学] 080204[工学-车辆工程] 0802[工学-机械工程] 0823[工学-交通运输工程] 

基　　金：Project(2020YFA0710901)supported by the National Key Research and Development Program of China Project(2023JJ30643)supported by the Natural Science Foundation of Hunan Province,China Project(12372204)supported by the National Natural Science Foundation of China Project(2022ZZTS0725)supported by the Self-exploration and Innovation Project for Postgraduates of Central South University,China 

主　　题：high-speed train numerical simulation drag reduction deflector streamlined design 

摘      要：The complex structure of the bottom of a high-speed train is an important source of train aerodynamic ***,improving the bottom structure is of great significance to reduce the aerodynamic drag of the *** this study,computational fluid dynamics(CFD)based on three-dimensional steady incompressible Reynolds-average Naiver-Stokes(RANS)equations and Realizable k-ε turbulence model were utilized for numerical *** by the concept of streamlined design and the idea of bottom flow field control,this study iteratively designed the bogies in a streamlined shape and combined them with the bottom deflectors to investigate the joint drag reduction *** models,i.e.,single-bogie model,simplified train model,and eight-car high-speed train model,were created and their aerodynamic characteristics were *** results show that the single-bogie model with streamlined design shows a noticeable drag reduction,whose power bogie and trailer bogie experience 13.92%and 7.63%drag reduction,*** range of positive pressure area on the bogie is *** aerodynamic drag can be further reduced to 15.01%by installing both the streamlined bogie and the deflector on the simplified train *** the streamlined bogies and deflectors are used on the eight-car model together,the total drag reduction rate reaches 2.90%.Therefore,the proposed aerodynamic kit for the high-speed train bottom is capable to improve the flow structure around the bogie regions,reduce the bottom flow velocity,and narrow the scope of the train’s influence on the surrounding environment,achieving the appreciable reduction of aerodynamic *** paper can provide a new idea for the drag reduction of high-speed trains.