Numerical and Experimental Analysis of the Aerodynamic Torque for Axle-Mounted Train Brake Discs
作者机构：Brake System LaboratoryCRCC(Qingdao)Vehicle Inspection Station Co.Ltd.Qingdao266031China Brake System LaboratoryCRRC Qingdao Sifang Rolling Stock Research Institute Co.Ltd.Qingdao266031China The State Key Laboratory of Heavy-Duty and Express High-Power Electric LocomotiveCentral South UniversityChangsha410075China Key Laboratory of Traffic Safety on Track of Ministry of EducationSchool of Traffic&Transportation EngineeringCentral South UniversityChangsha410075China National&Local Joint Engineering Research Center of Safety Technology for Rail VehicleChangsha410075China
出 版 物：《Fluid Dynamics & Materials Processing》 (流体力学与材料加工（英文）)
年 卷 期：2024年第20卷第8期
页 面：1867-1882页
核心收录：
学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）]
基 金：supported by the National Key Research and Development Program of China(2020YFA0710901) the National Natural Science Foundation of China(12002395) Natural Science Foundation of Hunan Province(Grant No.2023JJ30643)
主 题：Axle-mounted train brake disc aerodynamic torque wind tunnel test numerical simulation
摘 要：As the velocity of a train increases,the corresponding air pumping power consumption of the brake discs increases *** the present experimental study,a standard axle-mounted brake disc with circumferential pillars was analyzed using a 1:1 scale model and a test rig in a wind *** particular,three upstream velocities were selected on the basis of earlier investigations of trains operating at 160,250,and 400 km/h,***,3D steady computational fluid dynamics(CFD)simulations of the flow field were conducted to compare with the wind tunnel test *** results for a 3-car train at 180 km/h demonstrated:(1)good agreement between the air resistance torques obtained from the wind tunnel tests and the related numerical results,with differences ranging from 0.95%to 5.88%;(2)discrepancies ranging from 3.2 to 3.8 N·m;(3)cooling ribs contributing more than 60%of the air resistance torque;(4)the fast rotation of brake discs causing a significantly different flow field near the bogie area,resulting in 25 times more air pumping power loss than that obtained in the stationary brake-disc case.
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