[1] Yan Yan, Xu Zhan, Wei Wei, Ni Zhonghua, et al. Numerical investigation of liquid sloshing in FLNG membranetanks with various bottom slopes [J]. Journal of Southeast University (English Edition), 2020, 36 (3): 292-300. [doi:10.3969/j.issn.1003-7985.2020.03.007]

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Numerical investigation of liquid sloshing in FLNG membranetanks with various bottom slopes()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

36

Issue:

2020 03

Page:

292-300

Research Field:

Energy and Power Engineering

Publishing date:

2020-09-20

Info

Title:

Numerical investigation of liquid sloshing in FLNG membranetanks with various bottom slopes

Author(s):

Yan Yan¹;  Xu Zhan¹;  Wei Wei²;  Ni Zhonghua¹;  Sun Dongke¹

¹ School of Mechanical and Engineering, Southeast University, Nanjing 211189, China
² Zhangjiagang Research Institute of Hydrogen Energy Co. Ltd., Zhangjiagang 215637, China

Keywords:

liquid sloshing;  natural frequency;  sloped tank bottom;  volume-of-fluid method

PACS:

TE835

DOI:

10.3969/j.issn.1003-7985.2020.03.007

Abstract:

To analyze the bottom slope’s effect on the sloshing liquid in floating liquefied natural gas(FLNG)membrane tanks, a simulation model is built and applied to describe the liquid behavior in a sloshing container. The free surface motion is simulated by the volume-of-fluid method and the standard k-ε turbulence model. Experimental data and numerical results from references are used to validate the accuracy of the proposed simulation model. To study the influence of the sloped bottom on the liquid sloshing, different slope sizes and filling ratios are numerically simulated at the lowest natural frequency. The results reveal that the natural frequency can be determined by the average peak values of hydrodynamic parameters. The natural frequency and pressure loading on the tank walls decrease with the increase in the slope size. The peak pressure on the wall decreases by 5.45 kPa with the increase in the slope ratio from 5% to 20%. However, the relationship between the peak pressure and slope ratio is more significant with lower filling rates. Liquid behavior is more stable and independent with the change of the slope structure at a high filling rate(60%). The results of numerical simulation and modeling are expected to provide reference data for the design and operation of the FLNG system.

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Memo

Memo:

Biographies: Yan Yan(1988—), male, doctor, lecturer; Ni Zhonghua(corresponding author), male, doctor, professor, nzh2003@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.51905093), the Natural Science Foundation of Jiangsu Province for Young Scholars(No.BK20180392).
Citation: Yan Yan, Xu Zhan, Wei Wei, et al.Numerical investigation of liquid sloshing in FLNG membrane tanks with various bottom slopes[J].Journal of Southeast University(English Edition), 2020, 36(3):292-300.DOI:10.3969/j.issn.1003-7985.2020.03.007.

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