Experimental investigation on the aerodynamics of tunnel-passing for high speed train with a moving model rig

Song Junhao; Guo Dilong; Yang Guowei; Yang Qiansuo

doi:10.11729/syltlx20170002

Volume 31 Issue 5

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Journal of Experiments in Fluid Mechanics > 2017 > 31(5): 39-45. > DOI: 10.11729/syltlx20170002

Song Junhao, Guo Dilong, Yang Guowei, Yang Qiansuo. Experimental investigation on the aerodynamics of tunnel-passing for high speed train with a moving model rig[J]. Journal of Experiments in Fluid Mechanics, 2017, 31(5): 39-45. DOI: 10.11729/syltlx20170002

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Experimental investigation on the aerodynamics of tunnel-passing for high speed train with a moving model rig

Key Laboratory of Mechanics in Fluid Solid Coupling System, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China

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Received Date: January 02, 2017
Revised Date: August 23, 2017

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Abstract

When a high speed train enters a tunnel, a compressed wave occurs and propagates along the tunnel to the tunnel port, and transforms to be a micro pressure wave. Using the moving model rig experiment system, pressure waves and the micro pressure wave were measured in the double-track tunnel (60m in length) within the speed range of 200-350km/h. Firstly, the validity of experimental data was verified. Secondly, the reduction principle of the initial compression wave propagating in the tunnel and the relationship between the micro pressure wave and the train speed were drawn out. The effect of the streamlined nose shape on the micro pressure wave was studied at last. The experimental results show that in the speed ranges, the dimensionless values of the pressure wave and micro pressure wave are the same with different speeds. However, the relationship between the micro pressure wave and the streamlined nose length is only analyzed qualitatively, with quantitative relationship difficult to determine.
- tunnel effect,
- high speed train,
- micro pressure wave,
- compressed wave,
- streamline shape

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