Wind and Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Numerical investigation of the influence of structures in bogie area on the wake of a high-speed train

  • Wang, Dongwei (School of Mechanical Engineering, Southwest Jiaotong University) ;
  • Chen, Chunjun (School of Mechanical Engineering, Southwest Jiaotong University) ;
  • He, Zhiying (School of Mechanical Engineering, Southwest Jiaotong University)
  • Received : 2021.10.05
  • Accepted : 2022.05.06
  • Published : 2022.05.25
⟨ Previous Next ⟩

Abstract

The flow around a high-speed train with three underbody structures in the bogie area is numerically investigated using the improved delayed detached eddy simulation method. The vortex structure, pressure distribution, flow field structure, and unsteady velocity of the wake are analyzed by vortex identification criteria Q, frequency spectral analysis, empirical mode decomposition (EMD), and Hilbert spectral analysis. The results show that the structures of the bogie and its installation cabin reduce the momentum of fluid near the tail car, thus it is easy to induce flow separation and make the fluid no longer adhere to the side surface of the train, then forming vortices. Under the action of the vortices on the side of the tail car, the wake vortices have a trend of spanwise motion. But the deflector structure can prevent the separation on the side of the tail car. Besides, the bogie fairings do not affect the formation process and mechanism of the wake vortices, but the fairings prevent the low-speed fluid in the bogie installation cabin from flowing to the side of the train and reduce the number of the vortices in the wake region.

Keywords

Acknowledgement

The research described in this paper was financially supported by the National Natural Science Foundation of China (grant numbers 51975487).

References

  1. Baker, C. (2010), "The flow around high speed trains", J. Wind Eng. Ind. Aerod. 98, 277-298. https://doi.org/10.1016/j.jweia.2009.11.002.
  2. Bell, J.R., Burton, D., Thompson, M., Herbst, A. and Sheridan, J. (2014), "Wind tunnel analysis of the slipstream and wake of a high-speed train". J. Wind Eng. Ind. Aerod., 134, 122-138. https://doi.org/10.1016/j.jweia.2014.09.004.
  3. Bell, J.R., Burton, D., Thompson, M.C., Herbst, A.H. and Sheridan, J. (2016a), "Flow topology and unsteady features of the wake of a generic high-speed train", J. Fluids Struct., 61, 168-183. https://doi.org/10.1016/j.jfluidstructs.2015.11.009.
  4. Bell, J.R., Burton, D., Thompson, M.C., Herbst, A.H. and Sheridan, J. (2016b), "Dynamics of trailing vortices in the wake of a generic high-speed train", J. Fluids Struct., 65, 238-256. https://doi.org/10.1016/j.jfluidstructs.2016.06.003.
  5. Bell, J.R., Burton, D., Thompson, M.C., Herbst, A.H. and Sheridan, J. (2017a), "The effect of tail geometry on the slipstream and unsteady wake structure of high-speed trains", Exp. Therm. Fluid Sci., 83, 215-230. https://doi.org/10.1016/j.expthermflusci.2017.01.014.
  6. Bell, J.R., Burton, D., Thompson, M.C., Herbst, A.H. and Sheridan, J. (2017b), "A wind-tunnel methodology for assessing the slipstream of high-speed trains". J. Wind Eng. Ind. Aerod., 166, 1-19. https://doi.org/10.1016/j.jweia.2017.03.012.
  7. Bell, J.R., Burton, D., Thompson, M.C., Herbst, A.H., Sheridan, J. (2015), "Moving model analysis of the slipstream and wake of a high-speed train". J. Wind Eng. Ind. Aerod., 136, 127-137. https://doi.org/10.1016/j.jweia.2014.09.007.
  8. CEN European Standard (2013), Railway Applications-Aerodynamics. Part 4: Requirements and Test Procedures for Aerodynamics on Open Track, CEN EN 14067-4.
  9. Chong, M.S., Perry, A.E. and Cantwell, B.J. (1990), "A general classification of three-dimensional flow fields", Phys. Fluids A. 2(5), 765-777. https://doi.org/10.1063/1.857730.
  10. Gao, G., Li, F., He, K., Wang, J., Zhang, J. and Miao, X. (2019), "Investigation of bogie positions on the aerodynamic drag and near wake structure of a high-speed train", J. Wind Eng. Ind. Aerod., 185, 41-53. https://doi.org/10.1016/j.jweia.2018.10.012.
  11. Guo, D., Shang, K., Zhang, Y., Yang, G. and Sun, Z. (2016), "Influences of affiliated components and train length on the train wind", Acta Mech. Sin., 32, 191-205. https://doi.org/10.1007/s10409-015-0553-z.
  12. Huang, N.E, Shen, Z. and Long, S.R. (1999), "A new view of nonlinear water waves: the Hilbert spectrum", Annu Rev Fluid Mech., 31, 417-457. https://doi.org/10.1146/annurev.fluid.31.1.417.
  13. Huang, N.E., Shen, Z. and Long, S.R. (1998), "The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis", Proceedings of Royal Society. 44, 903-995. https://doi.org/10.1098/rspa.1998.0193.
  14. Hunt, J.C.R, Wray, A.A. and Moin P. (1988), "Eddies, streams, and convergence zones in turbulent flows", Center for Turbulence Research Proceedings of the Summer Program. 193-208.
  15. Jeong, J. and Hussain, F. (1995), "On the identification of a vortex", J. Fluid Mech. 285(4), 69-94. https://doi.org/10.1017/S0022112095000462.
  16. Liu, W., Guo, D., Zhang, Z., Chen, D. and Yang, G. (2019), "Effects of bogies on the wake flow of a high-speed train", Appl. Sci.-Basel., 9(4), 759. https://doi.org/10.3390/app9040759.
  17. Mandic, D.P., Rehman, N.U., Wu, Z. and Huang, N.E. (2013), "Empirical mode decomposition-based time-frequency analysis of multivariate signals: the power of adaptive data analysis", IEEE Signal Process. Mag. 30, 74-86. https://doi.org/10.1109/MSP.2013.2267931.
  18. Muld, T.W., Efraimsson, G. and Henningson, D.S. (2012), "Flow structures around a high-speed train extracted using Proper Orthogonal Decomposition and Dynamic Mode Decomposition", Comput. Fluids. 57, 87-97. https://doi.org/10.1016/j.compfluid.2011.12.012.
  19. Muld, T.W., Efraimsson, G. and Henningson, D.S. (2014), "Wake characteristics of high-speed trains with different lengths", Proc. Inst. Mech. Eng. Part F-J. Rail Rapid Transit., 228, 333-342. https://doi.org/10.1177/0954409712473922.
  20. Niu, J.Q., Zhou, D. and Liang, X.F. (2017), "Experimental research on the aerodynamic characteristics of a high-speed train under different turbulence conditions", Experiment. Thermal Fluid Sci., 80, 117-125. https://doi.org/10.1016/j.expthermflusci.2016.08.014.
  21. Osth, J., Kaiser, E., Krajnovic, S. and Noack, B.R. (2015), "Cluster-based reduced-order modelling of the flow in the wake of a high speed train", J. Wind Eng. Ind. Aerod., 145, 327-338. https://doi.org/10.1016/j.jweia.2015.06.003.
  22. Pope, C.W. (2007), "Effective management of risk from slipstream effects at trackside and platforms", Rail Safety Standards Board-T425 Report.
  23. Raghunathan, R.S., Kim, H.D. and Setoguchi, T. (2002), "Aerodynamics of high-speed railway train", Prog. Aeosp. Sci., 38(6), 469-514. https://doi.org/10.1016/S0376-0421(02)00029-5.
  24. Spalart, P.R. (2000), "Strategies for turbulence modelling and simulations", Int. J. Heat Fluid Flow. 21, 252-263. https://doi.org/10.1016/B978-008043328-8/50001-1.
  25. Spalart, P.R. (2009), "Detached-Eddy Simulation", Annu. Rev. Fluid Mech., 41, 181-202. https://doi.org/10.1146/annurev.fluid.010908.165130.
  26. Wang, D., Chen, C., Hu, J. and He, Z. (2020b), "The effect of Reynolds number on the unsteady wake of a high-speed train", J. Wind Eng. Ind. Aerod., 204, 104223. https://doi.org/10.1016/j.jweia.2020.104223.
  27. Wang, J., Gao, G., Li, X., Liang, X. and Zhang, J. (2020a), "Effect of bogie fairings on the flow behaviours and aerodynamic performance of a high-speed train", Veh. Syst. Dyn. 58, 890-910. https://doi.org/10.1080/00423114.2019.1607400.
  28. Wang, J., Minelli, G., Dong, T., Chen, G. and Krajnovic, S. (2019), "The effect of bogie fairings on the slipstream and wake flow of a high-speed train. An IDDES study", J. Wind Eng. Ind. Aerod., 191, 183-202. https://doi.org/10.1016/j.jweia.2019.06.010.
  29. Wang, S., Bell, J.R., Burton, D., Herbst, A.H., Sheridan, J. and Thompson, M.C. (2017), "The performance of different turbulence models (URANS, SAS and DES) for predicting high-speed train slipstream", J. Wind Eng. Ind. Aerod., 165, 46-57. https://doi.org/10.1016/j.jweia.2017.03.001.
  30. Wang, S., Burton, D., Herbst, A., Sheridan, J. and Thompson, M.C. (2018b), "The effect of bogies on high-speed train slipstream and wake", J. Fluids Struct. 83, 471-489. https://doi.org/10.1016/j.jfluidstructs.2018.03.013.
  31. Wang, S., Burton, D., Herbst, A.H., Sheridan, J. and Thompson, M.C. (2018a), "The effect of the ground condition on high-speed train slipstream", J. Wind Eng. Ind. Aerod., 172, 230-243. https://doi.org/10.1016/j.jweia.2017.11.009.
  32. Xia, C., Wang, H., Shan, X., Yang, Z. and Li, Q. (2017), "Effects of ground configurations on the slipstream and near wake of a high-speed train", J. Wind Eng. Ind. Aerod., 168, 177-189. https://doi.org/10.1016/j.jweia.2017.06.005.
  33. Xiao, Z., Liu, J., Luo, K., Huang, J. and Fu, S. (2013), "Investigation of flows around a rudimentary landing gear with advanced detached-eddy-simulation approaches", AIAA J. 51(1), 107-125. https://doi.org/10.2514/1.J051598.
  34. Yao, S.B., Guo, D.L., Sun, Z.X., Yang, G.W. and Chen, D.W. (2014), "Optimization design for aerodynamic elements of high speed trains", Comput. Fluids. 95, 56-73. https://doi.org/10.1016/j.compfluid.2014.02.018.
  35. Yao, S.B., Sun, Z.X., Guo, D.L., Chen, D.W., andYang, G.W. (2013), "Numerical study on wake characteristics of high-speed trains", Sinica Acta Mech. Sin. 29, 811-822. https://doi.org/10.1007/s10409-013-0077-3.
  36. Zhou, Z., Xia, C., Shan, X., and Yang, Z. (2020), "The impact of bogie sections on the wake dynamics of a high-speed train", Flow Turbul. Combust. 104, 89-113. https://doi.org/10.1007/s10494-019-00052-w.