ピッチング加振を受ける水平円筒容器内スロッシングの共振波高に対する多孔板の減衰効果の CFD を用いた評価

抄録

One of the mining methods of offshore gas field, Floating production, storage and offloading system (FPSO) is attracting attention. However, the sloshing in an oil-gas separator installed in FPSO excited by waves is expected to cause a serious problem. In order to reduce the sloshing wave height, one of the possible candidate is inserting perforated plates in the tank. In this research, the method for a precise estimation of sloshing wave height in a horizontal cylindrical tank with perforated plates under pitching excitation is proposed. To accomplish this purpose, the pressure loss due to perforated plate should be estimated precisely. Therefore, the relationship between flow velocity and pressure loss and the relationship between flow angle and pressure loss are investigated by CFD calculation. Then, the calculated wave height using the pressure loss calculated by CFD and wave height measured in experiment is compared. Finally, the method of calculating wave height is applied to the real scale FPSO.