Ocean Systems Engineering

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Sloshing suppression by floating baffle

  • Kang, Hooi-Siang (Marine Technology Centre, Universiti Teknologi Malaysia) ;
  • Md Arif, Ummul Ghafir (School of Mechanical Engineering, Universiti Teknologi Malaysia) ;
  • Kim, Kyung-Sung (School of Naval Architecture and Ocean Engineering, Tongmyong University) ;
  • Kim, Moo-Hyun (Department of Ocean Engineering, Texas A&M University) ;
  • Liu, Yu-Jie (Department of Ocean Engineering, Texas A&M University) ;
  • Lee, Kee-Quen (Department of Mechanical Precision Engineering, Malaysia-Japan International Institute of Technology) ;
  • Wu, Yun-Ta (Department of Hydraulic and Ocean Engineering, National Cheng Kung University)
  • Received : 2019.05.22
  • Accepted : 2019.07.22
  • Published : 2019.12.25
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Abstract

Sloshing is a phenomenon which may lead to dynamic stability and damages on the local structure of the tank. Hence, several anti-sloshing devices are introduced in order to reduce the impact pressure and free surface elevation of liquid. A fixed baffle is the most prevailing anti-sloshing mechanism compared to the other methods. However, the additional of the baffle as the internal structure of the LNG tank can lead to frequent damages in long-term usage as this structure absorbs the sloshing loads and thus increases the maintenance cost and downtime. In this paper, a novel type of floating baffle is proposed to suppress the sloshing effect in LNG tank without the need for reconstructing the tank. The sloshing phenomenon in a membrane type LNG tank model was excited under sway motion with 30% and 50% filling condition in the model test. A regular motion by a linear actuator was applied to the tank model at different amplitudes and constant period at 1.1 seconds. Three pressure sensors were installed on the tank wall to measure the impact pressure, and a high-speed camera was utilized to record the sloshing motion. The floater baffle was modeled on the basis of uniform-discretization of domain and tested based on parametric variations. Data of pressure sensors were collected for cases without- and with-floating baffle. The results indicated successful reduction of surface run-up and impulsive pressure by using a floating baffle. The findings are expected to bring significant impacts towards safer sea transportation of LNG.

Keywords

Acknowledgement

Supported by : Texas A&M University

References

  1. Abramson, H.N. (1966), The dynamic behavior of liquids in moving containers, with applications to space vehicle technology, Tech. Rep. NASA-SP-106, NASA.
  2. Akyildiz, H. and Unal, E. (2005), "Experimental investigation of pressure distribution on a rectangular tank due to the liquid sloshing", Ocean Eng., 32,1503-1516. https://doi.org/10.1016/j.oceaneng.2004.11.006
  3. Arai, M., Suzuki, R., Ando, T. and Kishimoto, N. (2013), Performance study of an anti-sloshing floating device for membrane-type LNG tanks. Dev Marit Transp Exploit Sea Resour IMAM 171.
  4. Arif, U.G.M., Kamaruddin, M.H., Tang, C.H.H., Siow, C.L., Quen, L.K., Kim, K.S., Wu, Y.T. and Kang, H.S. (2019), "Sloshing in closed domain under unidirection excitation", Indian J. Geo Mar. Sci., 48, 1145-1153.
  5. Bakti, F., Kim, M.H., Kim, K.S. and Park, J.C. (2016), "Comparative study of standard WC-SPH and MPS solvers for free surface academic problems", Int. J. Offshore Polar Eng., 26, 235-243. https://doi.org/10.17736/ijope.2016.pf17
  6. Chen, H.C. (2011), "CFD simulation of compressible two-phase sloshing flow in a LNG tank", Ocean Syst. Eng., 1(1), 31-57. https://doi.org/10.12989/ose.2011.1.1.031
  7. Cho, I.H., Choi, J.S. and Kim, M.H. (2017), "Sloshing reduction in a swaying rectangular tank by an horizontal porous baffle", Ocean Eng., 138, 23-34. https://doi.org/10.1016/j.oceaneng.2017.04.005
  8. Demirel, E. and Aral, M. (2018), "Liquid sloshing damping in an accelerated tank using a novel slot-baffle design", Water, 10, 1565. https://doi.org/10.3390/w10111565
  9. Faltinsen, O.M. (1974), "A nonlinear theory of sloshing in rectangular tanks", J.Ship Res., 18, 224-241. https://doi.org/10.5957/jsr.1974.18.4.224
  10. Faltinsen, O.M. and Rognebakke, O.F. (2000), "Sloshing", Proceedings of the Int. Conf. on Ship and Shipping Research (NAV 2000), Venice, Italy.
  11. Gnitko, V., Naumemko, Y. and Strelnikova, E. (2017), "Low frequency sloshing analysis of cylindrical containers with flat and conical baffles", Int. J. Appl. Mech. Eng., 22, 867-881. https://doi.org/10.1515/ijame-2017-0056
  12. Graczyk M (2008) "Experimental investigation of sloshing loading and load effects in membrane LNG tanks subjected to random excitation", Norwegian University of Science and Technology.
  13. Hamlin NA (1990) Liquid slosh loading in slack ship tanks: Forces on internal structure and pressures (No. SSC-336).
  14. Kang, X., Rakheja, S. and Stiharu, I. (2002), "Cargo load shift and its influence on tank vehicle dynamics under braking and turning", Int. J. Heavy Veh. Syst., 9, 173-203. https://doi.org/10.1504/IJHVS.2002.001175
  15. Kim, K.S., Kim, M.H. and Park, J.C. (2014), "Development of moving particle simulation method for multiliquid-layer sloshing", Math. Probl. Eng., 2014, 1-13.
  16. Kim, S., Kim, Y., Park, J. and Kim, B. (2016), "Experimental study of sloshing load on LNG tanks for unrestricted filling operation", Proceedings of the 26th (2016) International Ocean and Polar Engineering Conference, Rhodes, Greece.
  17. Kim, Y., Kim, S.Y., Ahn, Y., et al. (2013), "Model-scale sloshing tests for an anti-sloshing blanket system", Int. J. Offshore Polar Eng., 23, 254-262.
  18. Kobayakawa, H., Kusumoto, H. and Toyoda, M. (2015), "Structural safety of IHI-SPB LNG tanks against sloshing", IHI Eng. Rev., 47, 22-26.
  19. Kolaei, A., Rakheja, S. and Richard, M.J. (2017), "Coupled multimodal fluid-vehicle model for analysis of anti-slosh effectiveness of longitudinal baffles in a partially-filled tank vehicle", J. Fluids Struct., 70, 519-536. https://doi.org/10.1016/j.jfluidstructs.2017.02.012
  20. Kumar, N. (2013), "Study of Sloshing Effects in a Cylindrical Tank with and without Baffles under Linear Acceleration", National Institute of Technology.
  21. Lee, D.H., Ha, M.K., Kim, S.Y. and Shin, S.C. (2014), "Research of design challenges and new technologies for floating LNG", Int. J. Nav. Archit. Ocean Eng., 6, 307-322. https://doi.org/10.2478/IJNAOE-2013-0181
  22. Lee, J.S., You, W.H., Yoo, C.H., et al. (2013), "An experimental study on fatigue performance of cryogenic metallic materials for IMO type B tank", Int. J. Nav. Archit. Ocean Eng., 5, 580-597. https://doi.org/10.2478/IJNAOE-2013-0155
  23. Paik, J.K. and Shin, Y.S. (2006), "Structural damage and strength criteria for ship stiffened panels under impact pressure actions arising from sloshing, slamming and green water loading", Ships Offshore Struct., 1, 249-256. https://doi.org/10.1533/saos.2006.0109
  24. Panigrahy, P.K., Saha, U.K., Maity, D. and Sharma, S. (2006), "Wall pressures on a square tank due to liquid sloshing", Proceedings of the 3rd International Conference on Fluid Mechanics and Fluid Power, Bombay, India.
  25. Pastoor, W., Tveitnes, T., Valsgard, S. and Sele, H. (2004), "Sloshing in partially filled LNG tanks-an experimental survey", Proceedings of the Offshore Technology Conference. Offshore Technology Conference, Houston, Texas, USA.
  26. Rebouillat, S. and Liksonov, D. (2010), "Fluid-structure interaction in partially filled liquid containers: A comparative review of numerical approaches", Comput Fluids, 39, 739-746. https://doi.org/10.1016/j.compfluid.2009.12.010
  27. Rognebakke, O.F., Hoff, J.R., Allers, J.M., et al. (2005), "Experimental approaches for determining sloshing loads in LNG tanks", Proceedings of the SNAME Maritime Technology Conference and Exposition, Houston, Texas. Houston, Texas, USA.
  28. Sanapala, V.S., Rajkumar, M., Velusamy, K. and Patnaik, B.S.V. (2018), "Numerical simulation of parametric liquid sloshing in a horizontally baffled rectangular container", J. Fluids Struct., 76, 229-250. https://doi.org/10.1016/j.jfluidstructs.2017.10.001
  29. Vakilaadsarabi, A., Miyajima, M. and Murata, K. (2012), "Study of the sloshing of water reservoirs and tanks due to long period and long duration seismic motions", Procerdings of the 15th World Conference on Earthquake Engineering, Lisbon, Portugal.
  30. Wang, W. and Xiong, Y.P. (2014), "Minimising the sloshing impact in membrane LNG tank using a baffle",: Proceedings of the 9th International Conference on Structural Dynamics (EURODYN 2014). EURODYN.
  31. Xu, G., Hamouda, A.M.S. and Khoo, B.C. (2011), "Numerical simulation of fully nonlinear sloshing waves in three-dimensional tank under random excitation", Ocean Syst. Eng., 1(4), 355-372. https://doi.org/10.12989/ose.2011.1.4.355
  32. Xue, M.A., Zheng, J., Lin, P. and Yuan, X. (2017), "Experimental study on vertical baffles of different configurations in suppressing sloshing pressure", Ocean Eng., 136, 178-189. https://doi.org/10.1016/j.oceaneng.2017.03.031
  33. Yamauchi, K., Yoshimura, K., Hanada, Y. and Kojima, K. (2019), "Development of Fuel Sloshing Evaluation Technique upon Crash Using Fluid-Structure Interaction Simulation", In: SAE Technical Paper 2019-01-0941. SAE International.
  34. Younes, M.F. and Younes, Y.K. (2015), "Experimental investigation for liquid sloshing in baffled rectangular Tanks", Int. J. Sci. Technol. Res., 4, 57-61.
  35. Yu, Y.M., Ma, N., Fan, S.M. and Gu, X.C. (2017), "Experimental and numerical studies on sloshing in a membrane-type LNG tank with two floating plates", Ocean Eng., 129, 217-227. https://doi.org/10.1016/j.oceaneng.2016.11.029
  36. Zhang, C., Su, P. and Ning, D. (2019), "Hydrodynamic study of an anti-sloshing technique using floating foams", Ocean Eng., 175, 62-70. https://doi.org/10.1016/j.oceaneng.2019.02.014
  37. Zhao, Y., Chen, H.C. and Yu, X. (2015),"Numerical simulation of wave slamming on 3D offshore platform deck using a coupled Level-Set and Volume-of-Fluid method for overset grid system", Ocean Syst. Eng., 5(4), 245-259. https://doi.org/10.12989/ose.2015.5.4.245
  38. Zhu, F., Lu, J., Li, Y. and Gan, X. (2015), "Analysis on risks and hazards of the sloshing liquid cargo tank in oil tanker", Proceedings of the International Conference on Chemical, Material and Food Engineering.
  39. Zhuang, Y., Yin, C. and Wan, D. (2016), "Numerical study on coupling effect of LNG tank sloshing and ship motion in waves", Procerdings of the 11th Asian Computational Fluid Dynamics Conference (ACFD11), Dalian, China.