Scholarlink

<p>Hydrodynamic behaviour of moonpool oscillations in large FPSO (floating production storage and offloading) vessels is investigated through computational analysis and scale-model laboratory experiments. The computational analysis is carried out using the STAR-CCM + software. The scale-model experiments were carried out in (90.0&#xa0;m × 4.0&#xa0;m × 3.0&#xa0;m) wave flume with a flap wavemaker and in (88.0&#xa0;m × 3.2&#xa0;m × 2.6&#xa0;m) towing tank in the Ocean Engineering Department of IIT Madras. Of particular focus of the study has been on the generation of moonpool oscillations by ambient waves and ship motion and the influence of moonpool oscillations on the FPSO ship resistance. Geometrically, the moonpool is modelled as the annular gap between concentric cylinders and is located at the front of a large FPSO platform. The computational and experimental analyses are carried for a range of parameters, such as amplitude, frequency of wave motion, and forward speed. The numerical and experimental results compare reasonably well, though not quantitatively exactly, as elaborated in the paper. Several interesting flow physics, for example, the excitation of moonpool oscillations by the vortices shed at the edge of moonpool entry are revealed in the study. Flow visualisation from CFD reveals complex vortex and flow interactions resulting from the water column motions in moonpool. Experiments were conducted both with and without moonpool, and the results confirm that moonpool oscillation augments the resistance of the FPSO. Ongoing and future studies on the topic are also discussed.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Computational and experimental investigation of the hydrodynamics of moonpool oscillations in large floating production storage and offloading vessels

  • 期刊论文

  • 发表日期：

    2025年3月1日

查看全文
  • Abhishek Yadav,
  • V. Anantha Subramanian,
  • P. Ananthakrishnan

摘要

Hydrodynamic behaviour of moonpool oscillations in large FPSO (floating production storage and offloading) vessels is investigated through computational analysis and scale-model laboratory experiments. The computational analysis is carried out using the STAR-CCM + software. The scale-model experiments were carried out in (90.0 m × 4.0 m × 3.0 m) wave flume with a flap wavemaker and in (88.0 m × 3.2 m × 2.6 m) towing tank in the Ocean Engineering Department of IIT Madras. Of particular focus of the study has been on the generation of moonpool oscillations by ambient waves and ship motion and the influence of moonpool oscillations on the FPSO ship resistance. Geometrically, the moonpool is modelled as the annular gap between concentric cylinders and is located at the front of a large FPSO platform. The computational and experimental analyses are carried for a range of parameters, such as amplitude, frequency of wave motion, and forward speed. The numerical and experimental results compare reasonably well, though not quantitatively exactly, as elaborated in the paper. Several interesting flow physics, for example, the excitation of moonpool oscillations by the vortices shed at the edge of moonpool entry are revealed in the study. Flow visualisation from CFD reveals complex vortex and flow interactions resulting from the water column motions in moonpool. Experiments were conducted both with and without moonpool, and the results confirm that moonpool oscillation augments the resistance of the FPSO. Ongoing and future studies on the topic are also discussed.