Moving model analysis on the transient pressure and slipstream caused by a metro train passing through a tunnel

English version

Autoři: Shuang Meng ^aff001; Dan Zhou ^aff001; Zhe Wang ^aff001
Působiště autorů: Key Laboratory of Traffic Safety on Track (Central South University), Ministry of Education, Changsha, Hunan, China ^aff001; Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Changsha, Hunan, China ^aff002; National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, Changsha, Hunan, China ^aff003
Vyšlo v časopise: PLoS ONE 14(9)
Kategorie: Research Article
doi: https://doi.org/10.1371/journal.pone.0222151

Souhrn

In this study, the spatial distribution of the transient pressure and the slipstream caused by a 1/10 scaled metro train passing through a tunnel was studied with moving model test. We hereby investigate the mechanism underlying the mitigation of the transient pressure on both the train surface and tunnel wall, as well as that of the slipstream in the tunnel. Experimental results showed that the airshaft at different locations in a tunnel had different pressure relief effects. The most significant pressure amplitude decreased by 36.0% with the airshaft locating in the middle of the tunnel. Meanwhile, the slipstream speed was also relieved from 0.45 to 0.36 after an airshaft. We also assessed and analyzed the impact of train speed on the transient pressures and slipstream. It was found that the increase of the train speed would increase the transient pressure and slipstream speed, but it did not effect their spatial distribution.

Klíčová slova:

Physical sciences – Physics – Classical mechanics – Dynamics – Aerodynamics – Waves – Wave interference – Research and analysis methods – Research design – Field tests – Simulation and modeling – Engineering and technology – Mechanical engineering – Pistons – Equipment – Computer and information sciences – Data visualization – Schematic diagrams

Zdroje

1. Ogawa T., & Fujii K., 1997. Numerical investigation of three-dimensional compressible flows induced by a train moving into a tunnel. Comput. Fluids. 26(6), 565–585.

2. Baron A., Mossi M., & Sibilla S., 2001. The alleviation of the aerodynamic drag and wave effects of high-speed trains in very long tunnels. J. Wind Eng. Ind. Aerod. 89(5), 365–401.

3. Ricco P., Baron A., & Molteni P., 2007. Nature of pressure waves induced by a high-speed train travelling through a tunnel. J. Wind Eng. Ind. Aerod. 95(8), 781–808.

4. Khayrullina A., Blocken B., Janssen W., & Straathof J., 2015. CFD simulation of train aerodynamics: slipstream conditions at an underground railroad passenger platform. J. Wind Eng. Ind. Aerod. 139, 100–110.

5. Chu C. R., Chien S. Y., Wang C. Y., & Wu T. R., 2014. Numerical simulation of two trains intersecting in a tunnel. Tunn. Undergr. Space Technol. 42(5), 161–174.

6. Cross D., Hughes B., Ingham D., & Lin M., 2015. A validated numerical investigation of the effects of high blockage ratio and train and tunnel length upon underground railway aerodynamics. J. Wind Eng. Ind. Aerod. 146(17), 195–206.

7. Fu M., Li P., & Liang X. (2017). Numerical analysis of the wake development around a high-speed train in a double-track tunnel. Plos One. 12(3), e0175044. doi: 10.1371/journal.pone.0175044 28362835

8. Wang T., Wu F., Yang M., Ji P., & Qian B. (2018). Reduction of pressure transients of high-speed train passing through a tunnel by cross-section increase. J. Wind Eng. Ind. Aerod. 183, 235–242.

9. Jiqiang N., Dan Z., Feng L., & Yanping Y.. (2018). Effect of train length on fluctuating aerodynamic pressure wave in tunnels and method for determining the amplitude of pressure wave on trains. Tunnelling and Underground Space Technology, S0886779817305126-.

10. Hui Yuan., Dan Zhou., & Shuang Meng. (2019). Study of the unsteady aerodynamic performance of an inter-city train passing through a station in a tunnel. Tunnelling and Underground Space Technology, 86, 1–9.

11. Guang Z., Hyeon K. D., & Dong K. H.. (2018). Numerical studies on the radiation of train-tunnel impulse waves. Tunnelling and Underground Space Technology, 80, 211–221.

12. Zhang G., Kim T. H., Kim D. H., & Kim H. D.. (2018). Prediction of micro-pressure waves generated at the exit of a model train tunnel. Journal of Wind Engineering and Industrial Aerodynamics, 183, 127–139.

13. Uystepruyst D., William-Louis M., & François Monnoyer. (2013). 3d numerical design of tunnel hood. Tunn. Undergr. Space Technol. 38(9), 517–525.

14. Zhang L., Liu H., Stoll N., & Thurow K., 2017(a). Influence of tunnel aerodynamic effects by slope of equal-transect ring oblique tunnel portal. J. Wind Eng. Ind. Aerod. 169, 106–116.

15. Zhang L., Thurow K., Stoll N., & Liu H., 2018. Influence of the geometry of equal-transect oblique tunnel portal on compression wave and micro-pressure wave generated by high-speed trains entering tunnels. J. Wind Eng. Ind. Aerod. 178, 1–17.

16. Niu J., Zhou D., Liang X., Liu T., & Liu S., 2017. Numerical study on the aerodynamic pressure of a metro train running between two adjacent platforms. Tunn. Undergr. Space Technol. 65, 187–199.

17. Kim J. Y., & Kim K. Y., 2009. Effects of vent shaft location on the ventilation performance in a subway tunnel. J. Wind Eng. Ind. Aerod. 97(5–6), 174–179.

18. Rabani M., & Faghih A. K., 2015. Numerical analysis of airflow around a passenger train entering the tunnel. Tunn. Undergr. Space Technol. 45, 203–213.

19. Heine D., Ehrenfried K., Heine G., & Huntgeburth S., 2018. Experimental and theoretical study of the pressure wave generation in railway tunnels with vented tunnel portals. J. Wind Eng. Ind. Aerod. 176, 290–300.

20. Xue P., You S., Chao J., & Ye T., 2014. Numerical investigation of unsteady airflow in subway influenced by piston effect based on dynamic mesh. Tunn. Undergr. Space Technol. 40, 174–181.

21. López González, Marta, Galdo Vega, Mónica Fernández Oro, Jesús Manuel, & Blanco Marigorta, E., 2014. Numerical modeling of the piston effect in longitudinal ventilation systems for subway tunnels. Tunn. Undergr. Space Technol. 40, 22–37.

22. Baker C. J., 1986. Train aerodynamic forces and moments from moving model experiments. J. Wind Eng. Ind. Aerod. 24(3), 227–251.

23. Yang Q. S., Song J. H., & Yang G. W., 2016. A moving model rig with a scale ratio of 1/8 for high speed train aerodynamics. J. Wind Eng. Ind. Aerod. 152, 50–58.

24. Kim J. Y., & Kim K. Y., 2007. Experimental and numerical analyses of train-induced unsteady tunnel flow in subway. Tunn. Undergr. Space Technol. 22(2), 166–172.

25. Doi T., Ogawa T., Masubuchi T., & Kaku J., 2010. Development of an experimental facility for measuring pressure waves generated by high-speed trains. J. Wind Eng. Ind. Aerod. 98(1), 55–61.

26. Baker C., Jordan S., Gilbert T., Quinn A., Sterling M., Johnson T., & Lane J., 2014. Transient aerodynamic pressures and forces on trackside and overhead structures due to passing trains. Part 1: Model-scale experiments; Part 2: Standards applications. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 228(1), 37–70.

27. Sterling M., Baker C. J., Jordan S. C., & Johnson T., 2008. A study of the wakes of high-speed passenger trains and freight trains. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 222(2), 177–193.

28. Soper D., Baker C., & Sterling M., 2014. Experimental investigation of the wake development around a container freight train using a moving model facility. J. Wind Eng. Ind. Aerod. 135, 105–117.

29. Miyachi T., Fukuda T., & Saito S., 2014. Model experiment and analysis of pressure waves emitted from portals of a tunnel with a branch. J. Sound. Vib. 333(23), 6156–6169.

30. Liu F., Yao S., Zhang J., & Zhang Y. B., 2016. Effect of increased linings on micro-pressure waves in a high-speed railway tunnel. Tunn. Undergr. Space Technol. 52, 62–70.

31. Zhou D., Tian H. Q., Zhang J., & Yang M. Z., 2014. Pressure transients induced by a high-speed train passing through a station. J. Wind Eng. Ind. Aerod. 135, 1–9.

32. Zhang L., Yang M. Z., Liang X. F., & Zhang J., 2017(b). Oblique tunnel portal effects on train and tunnel aerodynamics based on moving model tests. J. Wind Eng. Ind. Aerod. 167, 128–139.

33. Gilbert T., Baker C. J., & Quinn A., 2013. Gusts caused by high-speed trains in confined spaces and tunnels. J. Wind Eng. Ind. Aerod. 121(5), 39–48.

34. Niu J. Q., Zhou D., Liang X. F., Liu S., & Liu T. H., 2018. Numerical simulation of the Reynolds number effect on the aerodynamic pressure in tunnels. J. Wind Eng. Ind. Aerod. 173, 187–198.

35. BS EN, 2006. Railway applications–aerodynamics-Part5: requirements and test procedures for aerodynamics in tunnels. BS EN 14067–5, 7–9.

36. Zhang H., Zhu C., Zheng W., You S., Ye T., & Xue P.. (2016). Experimental and numerical investigation of braking energy on thermal environment of underground subway station in china\"s northern severe cold regions. Energy, 116, 880–893.

37. Zhang H., Cui T., Liu M., Zheng W., Zhu C., & You S., et al. (2017). Energy performance investigation of an innovative environmental control system in subway station. Building and Environment, 126, 68–81.

Moving model analysis on the transient pressure and slipstream caused by a metro train passing through a tunnel

Souhrn

Klíčová slova:

Zdroje

PLOS One

Svět praktické medicíny 1/2024 (znalostní test z časopisu)

Koncepce osteologické péče pro gynekology a praktické lékaře

Sekvenční léčba schizofrenie

Hypertenze a hypercholesterolémie – synergický efekt léčby

Význam metforminu pro „udržitelnou“ terapii diabetu