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China Ocean Engineering

, Volume 32, Issue 6, pp 633–645 | Cite as

Experimental Investigation of Vibration Response of A Free-Hanging Flexible Riser Induced by Internal Gas-Liquid Slug Flow

  • Hong-jun ZhuEmail author
  • Hong-lei Zhao
  • Yue Gao
Article
  • 54 Downloads

Abstract

The vibration response of a free-hanging flexible riser induced by internal gas-liquid slug flow was studied experimentally in a small-diameter tube model based on Froude number criterion. The flow regime in a curved riser model and the response displacements of the riser were simultaneously recorded by high speed cameras. The gas superficial velocity ranges from 0.1 m/s to 0.6 m/s while the liquid superficial velocity from 0.06 m/s to 0.3 m/s. Severe slugging type 3, unstable oscillation flow and relatively stable slug flow were observed in the considered flow rates. Severe slugging type 3 characterized by premature gas penetration occurs at relatively low flow rates. Both the cycle time and slug length become shorter as the gas flow rate increases. The pressure at the riser base undergoes a longer period and larger amplitude of fluctuation as compared with the other two flow regimes. Additionally, severe slugging leads to the most vigorous in-plane vibration. However, the responses in the vertical and horizontal directions are not synchronized. The vertical vibration is dominated by the second mode while the horizontal vibration is dominated by the first mode. Similar to the vortex-induced vibration, three branches are identified as initial branch, build-up branch and descending branch for the response versus the mixture velocity of gas-liquid flow.

Key words

gas-liquid two-phase flow severe slugging liquid slug flexible riser flow-induced vibration 

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References

  1. Baliño, J.L., 2014. Modeling and simulation of severe slugging in airwater systems including inertial effects, Journal of Computational Science, 5(3), 482–495.CrossRefGoogle Scholar
  2. Baliño, J.L., Burr, K.P. and Nemoto, R.H., 2010. Modeling and simulation of severe slugging in air–water pipeline–riser systems, International Journal of Multiphase Flow, 36(8), 643–660.CrossRefGoogle Scholar
  3. Das, I., Wordsworth, C. and McNulty, G., 1999. Drilling and production technology: living with slugs on floaters, Marine Engineers Deep and Ultradeep Water Offshore Technology Conference, Newcastle, UK.Google Scholar
  4. Fabre, J., Peresson, L.L., Corteville, J., Odello, R. and Bourgeois, T., 1990. Severe slugging in pipeline/riser systems, SPE Production Engineering, 5(3), 299–305.CrossRefGoogle Scholar
  5. Hu, M.K., 1962. Visual pattern recognition by moment invariants, IRE Transactions on Information Theory, 8(2), 179–187.CrossRefzbMATHGoogle Scholar
  6. Huang, S., Khorasanchi, M. and Herfjord, K., 2011. Drag amplification of long flexible riser models undergoing multi-mode VIV in uniform currents, Journal of Fluids and Structures, 27(3), 342–353.CrossRefGoogle Scholar
  7. Huarte, F.J.H., Bearman, P.W. and Chaplin, J.R., 2006. On the force distribution along the axis of a flexible circular cylinder undergoing multi-mode vortex-induced vibrations, Journal of Fluids and Structures, 22(6–7), 897–903.CrossRefGoogle Scholar
  8. Jauvtis, N. and Williamson, C.H.K., 2004. The effect of two degree of freedom on vortex-induced vibration at low mass and damping, Journal of Fluid Mechanics, 509, 23–62.CrossRefzbMATHGoogle Scholar
  9. Khalak, A. and Williamson, C.H.K., 1999. Motions. forces and mode transitions in vortex-induced vibrations at low mass-damping, Journal of Fluids and Structures, 13(7–8), 813–851.CrossRefGoogle Scholar
  10. Li, N.L., Guo, L.J. and Li, W.S., 2013. Gas-liquid two-phase flow patterns in a pipeline–riser system with an S-shaped riser, International Journal of Multiphase Flow, 55, 1–10.CrossRefGoogle Scholar
  11. Malekzadeh, R., Henkes, R.A.W.M. and Mudde, R.F., 2012a. Severe slugging in a long pipeline–riser system: Experiments and predictions, International Journal of Multiphase Flow, 46, 9–21.CrossRefGoogle Scholar
  12. Malekzadeh, R., Belfroid, S.P.C. and Mudde, R.F., 2012b. Transient drift flux modelling of severe slugging in pipeline-riser systems, International Journal of Multiphase Flow, 46, 32–37.CrossRefGoogle Scholar
  13. Mokhatab, S., 2007. Severe slugging in a catenary-shaped riser: Experimental and simulation studies, Petroleum Science and Technology, 25(6), 719–740.CrossRefGoogle Scholar
  14. Mokhatab, S. and Towler, B.F., 2007. Severe slugging in flexible risers: review of experimental investigations and OLGA predictions, Petroleum Science and Technology, 25(7), 867–880.CrossRefGoogle Scholar
  15. Montgomery, J.A., 2002. Severe Slugging and Unstable Flows in An S-Shaped Riser, Ph.D. Thesis, Cranfield University, Bedfordshire, UK.Google Scholar
  16. Nemoto, R.H. and Baliño, J.L., 2012. Modeling and simulation of severe slugging with mass transfer effects, International Journal of Multiphase Flow, 40, 144–157.CrossRefGoogle Scholar
  17. Nydal, O.J., Audibert, M. and Johansen, M., 2001. Experiments and modeling of gas-liquid flow in an S-shaped riser, Proceeding of the 10th International Conference on Multiphase Flow, Cannes, France.Google Scholar
  18. Sarica, C. and Shoham, O., 1991. A simplified transient model for pipeline-riser systems, Chemical Engineering Science, 46(9), 2167–2179.CrossRefGoogle Scholar
  19. Schmidt, Z., Brill, J.P. and Beggs, H.D., 1980. Experimental study of severe slugging in a two-phase-flow pipeline–riser pipe system, Society of Petroleum Engineers Journal, 20(5), 407–414.CrossRefGoogle Scholar
  20. Schmidt, Z., Doty, D.R. and Dutta-Roy, K., 1985. Severe slugging in offshore pipeline–riser pipe system, Society of Petroleum Engineers Journal, 25(1), 27–38.CrossRefGoogle Scholar
  21. Taitel, Y., 1986. Stability of severe slugging, International Journal of Multiphase Flow, 12(2), 203–217.CrossRefzbMATHGoogle Scholar
  22. Taitel, Y., Vierkandt, S., Shoham, O. and Brill, J.P., 1990. Severe slugging in a riser system: Experiments and modeling, International Journal of Multiphase Flow, 16(1), 57–68.CrossRefzbMATHGoogle Scholar
  23. Tin, V., 1991. Severe slugging in flexible risers, Proceeding of 5th International Conference on Multiphase Technology, Cannes, France.Google Scholar
  24. Xing, L.C., Yeung, H., Shen, J. and Cao, Y., 2013. Numerical study on mitigating severe slugging in pipeline/riser system with wavy pipe, International Journal of Multiphase Flow, 53, 1–10.CrossRefGoogle Scholar
  25. Yeung, H. and Tchambak, E., 2003. Three-phase flows in an S-shaped riser–some preliminary results, Proceeding of 11th International Multiphase Flow Conference, San Remo, Italy.Google Scholar
  26. Zhu, H.J., Lin, P.Z. and Yao, J., 2016. An experimental investigation of vortex-induced vibration of a curved flexible pipe in shear flows, Ocean Engineering, 121, 62–75.CrossRefGoogle Scholar
  27. Zhu, H.J., Gao, Y. and Zhao, H.L., 2018. Experimental investigation on the flow-induced vibration of a free-hanging flexible riser by internal unstable hydrodynamic slug flow, Ocean Engineering, 164, 488–507.CrossRefGoogle Scholar

Copyright information

© Chinese Ocean Engineering Society and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationSouthwest Petroleum UniversityChengduChina

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