Tian-yi Mao, Feng-jun Bao, Jian-hua Wang, De-cheng Wan, Zhao-jie Wang
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Numerical study of air cavity characteristics of bow wave breaking of KCS ship under different speeds
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.
期刊介绍：
Journal of Hydrodynamics is devoted to the publication of original theoretical, computational and experimental contributions to the all aspects of hydrodynamics. It covers advances in the naval architecture and ocean engineering, marine and ocean engineering, environmental engineering, water conservancy and hydropower engineering, energy exploration, chemical engineering, biological and biomedical engineering etc.
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