Abstract: In the field of shipbuilding and ocean engineering, there exists a variety of cavity flows, wherein the flow process is more complex with an obvious turbulence structure. This study explores the influence of different aspect ratios on the cavity flow. Three cavity models with different height-width ratios were taken as the research objects, the mesh independence was analyzed, and the appropriate mesh was selected for numerical calculation. Large eddy simulation was used to analyze the flow field information of cavity flow with different aspect ratios. Furthermore, the velocity distribution, pressure distribution, and vorticity distribution were analyzed. The flow in the cavity with a small aspect ratio was more complex, and the vorticity nonlinearity was obvious, whereas the velocity and vorticity distribution in the cavity with a high aspect ratio were concentrated in the cavity opening region. The results of this study lay a theoretical foundation for the application of cavity flow in the field of ship engineering.

Key words: cavity flow, aspect ratio, pressure distribution, velocity, vorticity