Effects of detailed shape of air-shaft entrance hood on tunnel pressure waves

Abstract

Air-shaft entrance hood model with fence is investigated to reduce micro pressure wave in a single-track tunnel of the high-speed railway. Aerodynamically designed airshaft hoods are classified by 5 cases according to fence types and the micro pressure waves are measured by the low frequency sound level meters installed at a tunnel exit of a moving model test rig with a scale ratio of 1/64. Based on the case of no hood model, 5 different hood models were tested and analyzed for the speed of a model train from 180 km/h to 250 km/h.

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Acknowledgments

This research was supported by the Research Grand from Korean Railroad Research Institute through the Korea Agency for Infrastructure Technology Advancement funded by the Ministry of Land, Infrastructure and Transport of the Korean government (Project No: 19RTRP-C128198-03, Republic of Korea).

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Correspondence to Heuy Dong Kim.

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Dong Hyeon Kim received his B.S. and M.S. degrees from Chung-Ang University, Korea in 1986 and 1988. He then received his Ph.D. from Seoul National University, Korea in 1993. Currently, Dr. Kim is an Executive Researcher in Korea Railroad Research Institute (KRRI). His research interests include high-speed trains, subsonic speed capsule train, tunnel aerodynamics, micro-pressure wave, moving model test rig.

Yong Cheol Seo received his B.S. and M.S. degrees from Kumoh National institute of Technology, Korea in 2010 and 2012. Currently, he is a Ph.D. student in Transportation System Engineering at University of Science and Technology (UST), Korea. His research interests include subsonic speed capsule train, tunnel aerodynamics, micro-pressure wave.

Tae Ho Kim received his B.S. and M.S. degrees from Andong National University, Korea in 1995 and 1998. He then received his Ph.D. from Saga University, Japan in 2002. Currently, Dr. Kim is a Research Professor in Andong National University, Korea. His research interests include high-speed trains, compressible flow, and wet compression.

Heuy Dong Kim received his B.S. and M.S. degrees from Kyungpook National University, Korea in 1986 and 1988. He then received his Ph.D. from Kyushu University, Japan in 1991. Currently, Prof. Kim is a full time Professor in Andong National University, Korea. His research interests include high-speed trains, scramjet, shock tube studies, blast wave phenomena, aerodynamic noises and supersonic wind tunnels.

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Kim, D.H., Seo, Y.C., Kim, T.H. et al. Effects of detailed shape of air-shaft entrance hood on tunnel pressure waves. J Mech Sci Technol 35, 615–624 (2021). https://doi.org/10.1007/s12206-021-0121-3

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Keywords

  • Compressible flow
  • High-speed railway
  • Micro pressure wave
  • Moving model rig
  • Air-shaft hood
  • Tunnel pressure waves