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GENG Feng, ZHANG Qian, MEI Yuan-gui. Numerical value comparison of micro-pressure wave in reduction by using hoods at high-speed railway tunnel exit[J]. Journal of Traffic and Transportation Engineering, 2006, 6(3): 18-22.
Citation: GENG Feng, ZHANG Qian, MEI Yuan-gui. Numerical value comparison of micro-pressure wave in reduction by using hoods at high-speed railway tunnel exit[J]. Journal of Traffic and Transportation Engineering, 2006, 6(3): 18-22.
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Numerical value comparison of micro-pressure wave in reduction by using hoods at high-speed railway tunnel exit

  • 1.

    Department of Mechanical Engineering, Nanjing Institute of Technology, Nanjing 210013, Jiangsu, China

  • 2.

    Thermal and Power Engineering Institute, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China

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  • Author Bio:

    Geng Feng(1972-), male, lecturer, 86-25-83725359, geng-feng@sohu.com

  • Received Date: 2005-12-02
  • Publish Date: 2006-09-25
    Abstract
  • Based on analyzing the generating mechanism of micro-pressure wave at high-speed railway tunnel exit, with one-dimensional unsteady-compressible-nonisentropic air flow theory and round-piston radiation theory with infinite baffle plate, the rules of micro-pressure waves generated by high-speed train near tunnel exit under different shape hoods were studied, the influences of various shapes and parameters of hoods on the waves were qualitatively and quantitatively analyzed.It is indicated that the wave intensity evidently decrease with the length and cross-section area increasing of line-type, parabola-shaped and discontinuous-type hoods, the effect of discontinuous-type hood is evidentest; when hood cross-section area is constant, but hood construction is perforated, the choice for the best structural parameters needs an integrated plan contrast although the wave intensity can be greatly reduced.

     

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    • References(9)
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