Yan-tao, CaoCaoYan-taoLiang-hao, XuXuLiang-haoEn-hui, ZhengZhengEn-huiXiao-xing, PengPengXiao-xing2024-04-122024-04-122024-04-048th International Symposium on Marine Propulsors (smp 2024)978-82-691120-5-4https://hdl.handle.net/11420/46434The interaction between vortex cavitation and a lifting surface is commonly seen on a ship’s propeller and rudder. Such interaction would affect the stability of the vortex cavitation and thus induce various undesirable effects. However, there is few research focused on this phenomenon due to the complexity of the flow configuration. In this paper, the interaction between an upstream vortex cavity produced by an elliptical hydrofoil and a symmetric NACA profile hydrofoil in the downstream was observed using a high-speed camera in a cavitation tunnel. The results indicate that the radius of the vortex cavity grows gradually and the affected part shows remarkably discrepancy along streamwise with the decrease of cavitation number. Under certain cavitation number, the influenced part became unstable and thus produces the inner flow at the rear of the enlarged cavity. In addition, sheet cavitation would present on the hydrofoil surface influenced by the vortex cavity on which cavitation should not occur if there is no interaction when the cavitation number was decreased further. The unsteady shedding sheet cavity induced periodically shedding of the vortex cavity and inversely affected the instability of the upstream part of the vortex cavity.enhttp://rightsstatements.org/vocab/InC/1.0/Experimental observationvortex cavityinteraction with foil surfaceEngineering and Applied OperationsConference Paper10.15480/882.929910.15480/882.929910.15480/882.9294Conference Paper