Numerical and Experimental Analysis of the Aerodynamic Torque for Axle-Mounted Train Brake Discs  

作　　者：Nan Liu Chen Hong Xinchao Su Xing Jin Chen Jiang Yuqi Shi Bingkun Wang 

机构地区：[1]Brake System Laboratory,CRCC(Qingdao)Vehicle Inspection Station Co.,Ltd.,Qingdao,266031,China [2]Brake System Laboratory,CRRC Qingdao Sifang Rolling Stock Research Institute Co.,Ltd.,Qingdao,266031,China [3]The State Key Laboratory of Heavy-Duty and Express High-Power Electric Locomotive,Central South University,Changsha,410075,China [4]Key Laboratory of Traffic Safety on Track of Ministry of Education,School of Traffic&Transportation Engineering,Central South University,Changsha,410075,China [5]National&Local Joint Engineering Research Center of Safety Technology for Rail Vehicle,Changsha,410075,China

出　　处：《Fluid Dynamics & Materials Processing》2024年第8期1867-1882,共16页流体力学与材料加工（英文）

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).

摘　　要：As the velocity of a train increases,the corresponding air pumping power consumption of the brake discs increases proportionally.In 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 tunnel.In particular,three upstream velocities were selected on the basis of earlier investigations of trains operating at 160,250,and 400 km/h,respectively.Moreover,3D steady computational fluid dynamics(CFD)simulations of the flow field were conducted to compare with the wind tunnel test outcomes.The 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.

关 键 词：Axle-mounted train brake disc aerodynamic torque wind tunnel test numerical simulation 

分 类 号：O35[理学—流体力学]