Numerical study on the flow field characteristics of the new high-speed maglev train in open air

作     者：Peng ZHOU Tian LI Chun-fa ZHAO Ji-ye ZHANG Peng ZHOU;Tian LI;Chun-fa ZHAO;Ji-ye ZHANG

作者机构：State Key Laboratory of Traction PowerSouthwest Jiaotong UniversityChengdu 610031China 

出 版 物：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报（英文版）A辑（应用物理与工程）)

年 卷 期：2020年第21卷第5期

页      面：366-381页

核心收录：

学科分类：08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

基　　金：Project supported by the National Natural Science Foundation of China(No.51605397) the National Key R&D Program of China(No.2016YFB1200602-15) the Sichuan Provincial Science and Technology Support Program(No.2019YJ0227),China 

主　　题：Maglev train High-speed Improved delayed detached eddy simulation(IDDES) Aerodynamic load Vortex Time-averaged slipstream 

摘      要：With the increasing demand of higher travelling speed,a new streamlined high-speed maglev train has been designed to reach a speed of 600 km/*** better capture the flow field structures around the maglev train,an improved delayed detached eddy simulation(IDDES)is adopted to model the *** show that the new maglev train has good aerodynamic load performance such as small drag coefficient contributing to energy *** main frequencies of aerodynamic forces for each car have a scattered *** are two pairs of counter-rotating large vortices in the non-streamlined part of the train that make the boundary layer *** high-intensity vortices are distributed in the narrow space between skirt plates or train floor and *** the gap between the train floor and track(except near the tail car nose),the main frequency of vortex shedding remains constant and its strength increases exponentially in the streamwise *** the wake,the counter-rotating vortices gradually expand and reproduce some small vortices that move *** vortex has quite random and complex frequencydomain distribution characteristics in the *** maximum time-averaged velocity of the slipstream occurs near the nose of the head car,based on which,the track-side safety domain is divided.