Sloshing suppression by floating Baffle

Hooi Siang Kang, Ummul Ghafir Md Arif, Kyung Sung Kim, Moo Hyun Kim, Yu Jie Liu, Kee Quen Lee, Yun Ta Wu

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)409-422
Number of pages14
JournalOcean Systems Engineering
Volume9
Issue number4
DOIs
Publication statusPublished - 2019 Dec 1

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Automotive Engineering
  • Water Science and Technology
  • Ocean Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Kang, H. S., Arif, U. G. M., Kim, K. S., Kim, M. H., Liu, Y. J., Lee, K. Q., & Wu, Y. T. (2019). Sloshing suppression by floating Baffle. Ocean Systems Engineering, 9(4), 409-422. https://doi.org/10.12989/ose.2019.9.4.409