Numerical study of air cavity characteristics of bow wave breaking of KCS ship under different speeds  

作　　者：Tian-yi Mao Feng-jun Bao Jian-hua Wang De-cheng Wan Zhao-jie Wang 

机构地区：[1]Computational Marine Hydrodynamics Lab(CMHL),School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai,200240,China [2]Ningbo Pilot Station,Ningbo Dagang Pilotage Co.,Ltd.,Ningbo,315100,China [3]China Ship Research and Development Academy,Beijing,100191,China

出　　处：《Journal of Hydrodynamics》2024年第4期678-692,共15页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.52131102).

摘　　要：Ship bow wave breaking contains complex flow mechanism,which is very important for ship performance.In this study,a practical numerical simulation scheme for bow wave breaking is proposed and the scheme is applied to the simulation of bow wave breaking of KCS ship model with Fr=0.26,0.30,0.35,0.40,analyzing the impact of speed on the bow wave breaking.The results indicate that an increase in speed leads to a significant rise in viscous pressure resistance and more pronounced bow wave breaking.Moreover,it is found that the traditional wave height function in OpenFOAM is not suitable for detailed studies of bow wave breaking.This study extracts different free surfaces through top and bottom views to further analyze the free surface overturning,droplet splashing,and cavity entrainment in bow wave breaking.Additionally,the spatial and temporal distribution of cavities at Fr=0.40 is analyzed,revealing that cavity distribution is closely related to vortex structures and exhibits a periodic pulsation characteristic of approximately 12 s.

关 键 词：Bow wave breaking KRSIO Container Ship(KCS) air cavity delayed detached eddy simulation(DDES)method piecewise line interface calculation-volume of fluid(PLIC-VOF)method 

分 类 号：TV139.2[水利工程—水力学及河流动力学]