@Article{fdmp.2024.047427,
AUTHOR = {Nan Liu, Chen Hong, Xinchao Su, Xing Jin, Chen Jiang, Yuqi Shi, Bingkun Wang},
TITLE = {Numerical and Experimental Analysis of the Aerodynamic Torque for Axle-Mounted Train Brake Discs},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {20},
YEAR = {2024},
NUMBER = {8},
PAGES = {1867--1882},
URL = {http://www.techscience.com/fdmp/v20n8/57525},
ISSN = {1555-2578},
ABSTRACT = {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.},
DOI = {10.32604/fdmp.2024.047427}
}