병렬 배치된 LNG 벙커링 선박에 작용하는 조류하중에 관한 수치해석 연구

Abstract

Prediction of environmental loads acting on vesels to identify safe LNG bunkering operations is an important factor in analyzing the behavior of vesels mored in side-by-side configurations. Althougth curent loads can be estimated using the empircal coeficients, it is not easy to aply to vesels of arbitrary shape or vesels in side-by-side configurations. In this study, a numerical study of curent loads acting on LNG bunkering vesel mored in side-by-side are numericaly performed using a CFD code. Steady calculations were caried out using a Reynolds averaged Navier？Stokes (RANS) solver and the ST k-omega model. Numerical models and mesh systems were established acording to several important guidelines in CFD modeling practice for curent load prediction on a single ofshore vesel. To validate the present numerical models and mesh systems, the curent coeficients of KVLCC were compared with the existing experimental data and OCIMF coeficients. Curent load simulations were performed for side-by-side configurations using a validated numerical seting for a single vesel. Thre ship models were used for side-by-side configurations: a 0.5k bunkering vesel, a 5k LNG fueled-ship, and a 30k LNG fueled-ship. To investigate the characteristics of the curent load acting on the LNG bunkering vesel mored side by side, several simulations were considered for the lateral distance and relative draft betwen two vesels.