High speed photographic analysis of cavitation characteristics on the condition of aeration

The cavitation structures of semi-cylindrical irregularity were investigated by using high speed photography in the Hydraulics Laboratory at Zhejiang University of Technology and presented in this paper.The experiment was carried out with flow speed 7 to 40 m/s,frame rate of the camera was 20000fps and exposure time 4μs.The cavitation structures of semi-cylindrical irregularity and the interaction between aeration bubbles and cavitation bubbles were observed.The effects of different gas concentrations on the interaction between aeration bubbles and cavitation bubbles were also involved.