Complexity Simulation on Application of Asymmetric Bionic Cross-Section Rod in Pantographs of High-Speed Trains

Ground transportation means and aircrafts with high-speed running are composed of many rod components. Aerodynamic noise generated therefrom is very outstanding. Reduction of the aerodynamic noise of rods becomes a hot topic in recent years. Most reported studies are tentative researches on aerodynamic noise of a pantograph or involve noise reduction of the pantograph with using porous materials or reshaping rod surfaces. Through using porous materials and reshaping rod surface, the aerodynamic noise of pantograph can be reduced to a certain extent, but the aerodynamic resistance will be increased and it is not convenient for practical application in engineering. Regarding this situation, the paper explores noise reduction performance of a feather on the back of a carrier pigeon and conducts the bionic design on rod surface. Through numerical simulation, the paper researches noise reduction performance of the bionic structure on the rod surface, reveals the mechanism of bionic noise reduction, and explores noise reduction effects of bionic structural rods on pantographs of the high-speed trains.

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An Aerodynamic Noise Reduction Design at Inter-coach Space of High Speed Trains Based on Biomimetic Analogy

International Journal of Railway ◽

10.7782/ijr.2011.4.3.074 ◽

2011 ◽

Vol 4 (3) ◽

pp. 74-79 ◽

Cited By ~ 2

Author(s):

Jae-Hyun Han ◽

Jung-Soo Kim

Keyword(s):

Noise Reduction ◽

High Speed ◽

Aerodynamic Noise ◽

High Speed Trains

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A study of noise reduction in carriages of high speed trains : First report:Sound source search and model test of aerodynamic noise

The Proceedings of Conference of Chugoku-Shikoku Branch ◽

10.1299/jsmecs.2004.42.151 ◽

2004 ◽

Vol 2004.42 (0) ◽

pp. 151-152

Author(s):

Dai TATEISHI ◽

Masaharu NISHIMURA ◽

Tomonobu GOTO ◽

Masamitsu MORIOKA ◽

Masahiro SUGESAWA ◽

...

Keyword(s):

Noise Reduction ◽

Model Test ◽

High Speed ◽

Aerodynamic Noise ◽

High Speed Trains

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Aerodynamic Noise Reduction of Brake Disc for High-Speed Trains

Notes on Numerical Fluid Mechanics and Multidisciplinary Design - Noise and Vibration Mitigation for Rail Transportation Systems ◽

10.1007/978-3-319-73411-8_29 ◽

2018 ◽

pp. 389-400

Author(s):

N. Shiraishi ◽

Y. Wakabayashi ◽

T. Kurita ◽

T. Fujimoto ◽

Y. Ichikawa

Keyword(s):

Noise Reduction ◽

High Speed ◽

Aerodynamic Noise ◽

Brake Disc ◽

High Speed Trains

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Aerodynamic Noise Reduction using Porous Materials and their Application to High-speed Pantographs

Quarterly Report of RTRI ◽

10.2219/rtriqr.50.26 ◽

2009 ◽

Vol 50 (1) ◽

pp. 26-31 ◽

Cited By ~ 32

Author(s):

Takeshi SUEKI ◽

Mitsuru IKEDA ◽

Takehisa TAKAISHI

Keyword(s):

Noise Reduction ◽

Porous Materials ◽

High Speed ◽

Aerodynamic Noise

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Surrogate Based Optimization of Aerodynamic Noise for Streamlined Shape of High Speed Trains

Applied Sciences ◽

10.3390/app7020196 ◽

2017 ◽

Vol 7 (2) ◽

pp. 196 ◽

Cited By ~ 7

Author(s):

Zhenxu Sun ◽

Ye Zhang ◽

Guowei Yang

Keyword(s):

High Speed ◽

Aerodynamic Noise ◽

Surrogate Based Optimization ◽

High Speed Trains

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Recent developments in the prediction and control of aerodynamic noise from high-speed trains

International Journal of Rail Transportation ◽

10.1080/23248378.2015.1052996 ◽

2015 ◽

Vol 3 (3) ◽

pp. 119-150 ◽

Cited By ~ 35

Author(s):

David J. Thompson ◽

Eduardo Latorre Iglesias ◽

Xiaowan Liu ◽

Jianyue Zhu ◽

Zhiwei Hu

Keyword(s):

High Speed ◽

Aerodynamic Noise ◽

Recent Developments ◽

High Speed Trains ◽

Prediction And Control ◽

And Control

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Experimental investigation of the aerodynamic drag of roof-mounted insulators for trains

Proceedings of the Institution of Mechanical Engineers Part F Journal of Rail and Rapid Transit ◽

10.1177/0954409719867537 ◽

2019 ◽

Vol 234 (8) ◽

pp. 834-846

Author(s):

Jonathan Tschepe ◽

Jörg-Torsten Maaß ◽

Christian Navid Nayeri ◽

Christian Oliver Paschereit

Keyword(s):

Boundary Conditions ◽

Energy Demand ◽

High Speed ◽

Aerodynamic Drag ◽

Aerodynamic Resistance ◽

Reynolds Numbers ◽

Experimental Investigations ◽

Flexible Material ◽

High Speed Trains ◽

The Impact

This paper presents the results of experimental investigations on the aerodynamic drag of roof-mounted insulators for use on low- and high-speed trains. Wind tunnel investigations at different Reynolds numbers in the subcritical, critical, and supercritical flow regime were performed, in addition to investigations using wall-mounted cylinders. Furthermore, the impact of insulator sheds made of flexible material was analyzed. For a better understanding of the aerodynamic behavior of the insulators when mounted on trains, different boundary conditions representing realistic configurations as found on the roof of trains were simulated. From the measured drag, the energy demand to overcome the aerodynamic resistance of different types of insulators was calculated. Depending on the above mentioned boundary conditions, a noticeable contribution of the insulators to the entire train's aerodynamic drag could be observed. With flexible insulator sheds, a further increased air resistance was observed with the onset of fluttering. Similar to the cylinder, the aerodynamic behavior of the insulators depends on the respective Reynolds number.

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