Influence of aerodynamic braking on the pressure wave of a crossing high-speed train |
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| Authors: | Meng-ling Wu Yang-yong Zhu Chun Tian and Wei-wei Fei |
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| Institution: | Research Institute of Railway ＆ Urban Mass Transit, Tongji University, Shanghai 200092, China |
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| Abstract: | When aerodynamic braking works, the braking wings can change the flow field around the train, which may impact on the comfort
and safety. Based on a sliding mesh, the pressure wave and flow field around high-speed trains with aerodynamic braking are
analyzed. By comparing three typical intersection situations, the pressure wave of a high-speed train during braking (with
or without aerodynamic braking) is studied. The analyses indicate that the pressure wave around the high-speed train body
will change while using the aerodynamic braking, causing several pressure pulses on the surface of crossing high-speed trains.
The distances between the pressure pulses are equal to the longitudinal distances of the brake wings, but the magnitudes of
the fluctuations are less than those induced by the head of crossing trains. During the crossing, a train without aerodynamic
braking will not impact the crossing train. |
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