Experimental and Numerical Studies of Cloud Cavitation Behavior around a Reversible S-Shaped Hydrofoil

The S-shaped hydrofoil is often used in the design of reversible machinery due to its centrally symmetrical camber line. objective this paper study influence cloud cavitation on flow structure and unsteady characteristics lift drag around an via experimental tests numerical simulations. In component, were carried out a tunnel high-speed camera was record details with different numbers. results show that sheet gradually transforms into decrease inlet number, maximum cavity length increases faster after occurrence cavitation, shedding cycle time number. are good agreement data. movement re-entrant jet main factor for formation hydrofoil. induces U-shaped vortex hydrofoil, it produces higher vorticity distribution cavity. periodic motion causes fluctuation lift–drag coefficient because unique pressure appeared as two peaks one typical cavitation.