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LIN Shi-cai, WANG Jiu-gen. Frictional noise analysis of gas-solid interface with circular dents for high-speed train[J]. Journal of Traffic and Transportation Engineering, 2012, 12(3): 53-59. doi: 10.19818/j.cnki.1671-1637.2012.03.008
Citation: LIN Shi-cai, WANG Jiu-gen. Frictional noise analysis of gas-solid interface with circular dents for high-speed train[J]. Journal of Traffic and Transportation Engineering, 2012, 12(3): 53-59. doi: 10.19818/j.cnki.1671-1637.2012.03.008
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Frictional noise analysis of gas-solid interface with circular dents for high-speed train

doi: 10.19818/j.cnki.1671-1637.2012.03.008

  • Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China

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  • Author Bio:

    LIN Shi-cai (1987-), male, graduate student, +86-571-87951209, linscai@163.com

    WANG Jiu-gen (1963-), male, professor, PhD, +86-571-87951209, me_jg@zju.edu.cn

  • Received Date: 2011-12-20
  • Publish Date: 2012-06-25
    Abstract
  • Based on Prandtl boundary theory and frictional noise theory, a noise model of gas-solid interface of high-speed train was established, and the fields of pressure, rate and noise intensity were examined.The surface texture with circular dents for railway carriage was designed by mimicking eagle feather to yield micro whirl field resulting in less frictional air drag, and the influence of textural parameters on the distribution of noise intensity was studied.Simulation result demonstrates that the optimal depth-radius ratio, area ratio and topology type of surface texture can remarkably reduce frictional noise.Compared with smooth surface, the maximum reducing value of noise intensity for the surface texture with optimal depth-radius ratio is 11 dB, and the maximum reducing values of noise intensities for other optimal surface textures are 4-5 dB.

     

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