Yadong Zhang1, *, Jiye Zhang2
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.1, pp. 105-120, 2020, DOI:10.32604/fdmp.2020.07959
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… More >
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