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.
Similar content being viewed by others
References
R. S. Raghunathan, H. D. Kim and T. Setoguchi, Aerodynamics of high-speed railway train, Prog. Aerospance Sci., 38 (2002) 469–514.
H. D. Kim and T. Setoguchi, Study of the discharge of weak shocks from an open end of a duct, J. Sound Vib., 226 (1999) 1011–1028.
S. Ozawa, Studies of micro-pressure wave radiated from a tunnel exit, RTRI Report, 1121 (1979) 45–88.
H. D. Kim, T. H. Kim and D. H. Kim, Effect of tunnel entrance hood on entry compression wave, Trans. Korean Soc. Mech. Eng. B, 23 (1999) 58–68 (in Korean).
H. D. Kim, T. H. Kim, J. S. Lee and D. H. Kim, Characteristics of high-speed railway tunnel entry compression wave, Trans. Korean Soc. Mech. Eng. B., 23 (2) (1999) 234–242 (in Korean).
M. S. Howe, The genetically optimized tunnel-entrance hood, Journal of Fluid and Structures, 23 (8) (2007) 1231–1250.
X. T. Xiang and L. P. Xue, Tunnel hood effects on high speed train-tunnel compression wave, Journal of Hydrodynamics, Ser. B, 22 (5) (2010) 940–947.
T. H. Liu, H. Q. Tian and X. F. Liang, Design and optimization of tunnel hoods, Tunnelling and Underground Space Technology, 25 (2010) 212–219.
C. Gerbig and M. Hieke, Micro-pressure wave emissions from German high-speed railway tunnels — An approved method for prediction and acoustic assessment, Noise and Vibration Mitigation for Rail Transportation Systems, Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 126 (2015) 571–578.
T. Miyachi, M. Hieke, C. Gerbig, T. Fukuda and T. Tielkes, Acoustic modelling of micro-pressure waves emitted from high-speed railway tunnels with vented tunnel hoods, Proceedings of the 11th International Symposium on Aerodynamics, Ventilation and Fire in Tunnels, Lyon, France (2017) 13–15.
D. H. Kim and Y. C. Seo, Optimum evaluation of side air-shaft hood to reduce micro pressure wave in single-track tunnels of 250 km/h high-speed railway, Journal of the Korean Society for Railway, 21 (9) (2018) 849–858 (in Korean).
S. Ozawa, Investigation of pressure wave radiated from a tunnel exit, RTRI Report, 1023 (1976).
A. Yamamoto, Micro-pressure wave radiated from a tunnel exit, Preprint of the Spring Meeting of Physical Society of Japan, 4pH4, 4 (1977) 91–96.
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).
Author information
Authors and Affiliations
Corresponding author
Additional information
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.
Rights and permissions
About this article
Cite this article
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
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12206-021-0121-3