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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2011, Vol. 12 Issue (12): 971-978    DOI: 10.1631/jzus.A11GT005
Aerodynamics     
Numerical study on the aerodynamic performance and safe running of high-speed trains in sandstorms
Hong-bing Xiong, Wen-guang Yu, Da-wei Chen, Xue-ming Shao
Department of Mechanics, Zhejiang University, Hangzhou 310027, China, National Engineering Laboratory for System Integration of High-Speed Train (South), CSR Qingdao Sifang Co., Ltd., Qingdao 266111, China
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Abstract  The influence of sandstorms on train aerodynamic performance and safe running was studied in response to the frequent occurrence of sandstorm weather in north China. An Eulerian two-phase model in the computational fluid dynamic (CFD) software FLUENT, validated with published data, was used to solve the gas-solid multiphase flow of a sandstorm around a train. The train aerodynamic performance under different sandstorm levels and no sand conditions was then simulated. Results showed that in sandstorm weather, the drag, lift, side forces and overturning moment increase by variable degrees. Based on a numerical analysis of aerodynamic characteristics, an equation of train stability was also derived using the theory of moment balance from the view of dynamics. A recommended speed limit of a train under different sandstorm levels was calculated based on the stability analysis.

Key words： High-speed train      Sandstorm      Gas-solid multiphase      Eulerian two-phase model      Aerodynamic      Safety      Speed limit     
Received: 23 June 2011      Published: 01 December 2011
CLC:  O359  
  TD524  
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Hong-bing Xiong
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Hong-bing Xiong, Wen-guang Yu, Da-wei Chen, Xue-ming Shao. Numerical study on the aerodynamic performance and safe running of high-speed trains in sandstorms. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2011, 12(12): 971-978.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A11GT005     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2011/V12/I12/971

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