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ARTICLE
Numerical Simulation of the Aeroacoustic Performance of the DSA380 High-Speed Pantograph Under the Influence of a Crosswind
Yadong Zhang1, *, Jiye Zhang2
1 Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology,
Shenzhen, 518055, China.
2 State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031, China.
* Corresponding Author: Yadong Zhang. Email: .
(This article belongs to this Special Issue: Train Aerodynamics)
Fluid Dynamics & Materials Processing 2020, 16(1), 105-120. https://doi.org/10.32604/fdmp.2020.07959
Received 15 July 2019; Accepted 14 August 2019; Issue published 01 February 2020
Abstract
The object of research of this paper is the DSA380 high-speed pantograph. The
near-field unsteady flow around the pantograph was investigated using large eddy
simulation (LES) while the far-field aerodynamic noise was analysed in the frame of the
Ffowcs Williams-Hawkings (FW-H) acoustic analogy. According to the results, the contact
strip, base frame and knuckle are the main aerodynamic noise sources, with vortex shedding,
flow separation and recombination around the pantograph being related key physical factors.
The aerodynamic noise radiates outwards in the form of spherical waves when the distance
of the noise receiving point is farther than 8 m. The sound pressure level (SPL) grows
approximately as the 6th power of pantograph operating speed. The aerodynamic noise
energy is mainly concentrated in the region of 400-1000 Hz, and the frequency band is wider
with crosswind than without crosswind. The peak frequency displays a linear relationships
with the operating speed and crosswind velocity, respectively. The aerodynamic and
aeroacoustic generation from the knuckle-downstream orientation of the pantograph is
superior to those of the knuckle-upstream orientation model. This finding may be used for
the optimal design of future pantograph configurations in the presence of crosswind.
Keywords
Cite This Article
Zhang, Y., Zhang, J. (2020). Numerical Simulation of the Aeroacoustic Performance of the DSA380 High-Speed Pantograph Under the Influence of a Crosswind.
FDMP-Fluid Dynamics & Materials Processing, 16(1), 105–120.
Citations