Study on Aerodynamic Characteristics and Comparisons of High-speed Pantograph in Knuckle-downstream or Knuckle-upstream Direction

doi:10.3901/JME.2020.04.177

Abstract

Abstract: The aerodynamic performance of the pantograph seriously affects pantograph-catenary current collection quality and is one of the key factors for the running safety of high-speed trains. Based on the computational fluid dynamics, a high-speed pantograph aerodynamic model is established. The flow field around and aerodynamic characteristics of the high-speed pantograph in both knuckle-downstream and knuckle-upstream direction are compared and analyzed. The error in the aerodynamic drag of the pantograph between numerical simulation and wind tunnel test is 4.07%, and that of the aerodynamic lift of the panhead is 7.95%. Results show that the aerodynamic drag of the high-speed pantograph in the knuckle-downstream direction is larger by 2.24%-3.33% than that in the knuckle-upstream direction, and the panhead lifting force is larger by 5.45%-7.98%. The impact of running state on the lift force of the panhead strip is small. In the knuckle-downstream or knuckle-upstream direction, when the high speed pantograph running speed is no less than 400 km/h, the air compression effect has a greater influence on the aerodynamic drag of the pantograph, and increases with the increase of the speed. However, air compressibility has less effect on the aerodynamic lift force of the panhead.

Key words: high-speed pantograph, aerodynamic characteristics, knuckle-downstream and knuckle-upstream, train aerodynamics, compression effect

CLC Number:

U270

LI Tian, QIN Deng, ZOU Dong, ZHANG Jiye, ZHANG Weihua. Study on Aerodynamic Characteristics and Comparisons of High-speed Pantograph in Knuckle-downstream or Knuckle-upstream Direction[J]. Journal of Mechanical Engineering, 2020, 56(4): 177-184.

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