Prediction of entry compression waves induced by a high-speed train entering tunnel
- 1 Downloads
Tunnel wave produced by an entering high-speed train has always been one of the most prominent problems in the field of aeroacoustics. These waves are formed at the entrance of the tunnel and propagate ahead of the train at the local speed of sound. The formation process of the first of the successive compression wave at the entrance decides the nature and intensity of the subsequent waves. Thus, to visualize and understand the formation process; a numerical study has been conducted using commercial computational fluid dynamics (CFD) solver FLUENT 17.1. The dynamic mesh update techniques have been implemented to update the stationary domains as the train moves inside it. Pressure inside the tunnel is measured at distinct points to study the changes in the intensity of the compression wave. The flow physics has been comprehended using pressure plots and contours.
KeywordsCompressible flow Dynamic mesh Entry compression wave High-speed train Unsteady flow
Unable to display preview. Download preview PDF.
- M. S. Howe, On the compression wave generated when a high–speed train enters a tunnel with a flared portal, Journal of Fluids and Structures, Academic Press, 13 (1999) 481–498.Google Scholar
- M. Bellenoue, V. Moriniere and T. Kageyama, Experimental 3–D simulation of the compression wave, due to train–tunnel entry, Journal of Fluids and Structures, Elsevier Science Ltd., 16 (5) (2002) 581–595.Google Scholar
- S. Ozawa, Studies of micro–pressure wave radiated from a tunnel exit, Railway Tech. Res. Inst., Japanese National Railways, Rep. (1979) 1121.Google Scholar
- S. Ozawa and T. Maeda, Model experiment on reduction of micro–pressure wave radiated from tunnel exit, Proc. Intl. Symp. On Scale Modeling, Tokyo, 18–22 July, Seikei University, Japan Society of Mechanical Engineers (1988).Google Scholar
- S. Ozawa, T. Maeda, T. Matsumura, K. Uchida, H. Kajiyama and K. Tanemoto, Countermeasures to reduce micropressure waves radiating from exits of Shinkansen tunnel, Aerodynamics and Ventilation of Vehicle Tunnels, Elsevier (1976) 253–266.Google Scholar
- S. Ozawa, K. Tsukamoto and T. Maeda, Model experiments on devices to reduce pressure wave radiated from a tunnel, Railway Tech. Res. Inst., Japanese National Railways, Rep. 990 (1976).Google Scholar
- T. Maeda, T. Matsumura, M. Iida, K. Nakatani and K. Uchida, Effect of shape of train nose on compression wave generated by train entering tunnel, Proc. Intl Conf. on Speedup Technology for Railway and Maglev Vehicles, Yokohama, Japan, Japan Society of Mechanical Engineers (1993) 315–319.Google Scholar
- H. D. Kim, T. H. Kim, J. Lee and D. H. Kim, Characteristics of high–speed railway tunnel entry compression wave, Trans. Korean Soc. Mech. Eng. B, 23 (1999) 234–242.Google Scholar
- H. D. Kim, T. H. Kim, J. Lee and D. H. Kim, Characteristics of high–speed railway tunnel entry compression wave with porous hood, Trans. Korean Soc. Mech. Eng. B (1998) 705–710.Google Scholar
- 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.Google Scholar
- H. D. Kim, S. H. Woo and D. H. Kim, Analytical study on a train–induced unsteady pressure wave in high–speed railway tunnel, Trans. Korean Soc. Mech. Eng. B (1998) 638–643.Google Scholar