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Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2011, Vol. 12 Issue (12): 979-984    DOI: 10.1631/jzus.A11GT011
Aerodynamics     
Influence of aerodynamic braking on the pressure wave of a crossing high-speed train
Meng-ling Wu, Yang-yong Zhu, Chun Tian, Wei-wei Fei
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.

Key wordsAerodynamic braking      High-speed train      Crossing air pressure     
Received: 23 September 2011      Published: 01 December 2011
CLC:  U271.91  
Cite this article:

Meng-ling Wu, Yang-yong Zhu, Chun Tian, Wei-wei Fei. Influence of aerodynamic braking on the pressure wave of a crossing high-speed train. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2011, 12(12): 979-984.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A11GT011     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2011/V12/I12/979

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