Cavitation Performance of Cylindrical Choke for Unsteady Flow. 2nd Report. Comparison of Difference in Inlet Shape of Choke.

The cavitation performance in a cylindrical choke with a sharp edged-corner was investigated in previous paper. Many differences were detected in cavitation performance by changing the diameter and the length of a choke. The purpose of this paper is to find out in more detail the reason which causes the differences in the cavitation performance. Experiments are carried out using two kinds of cylindrical chokes with a sharp edged-corner and chamfered length at the choke inlet. The pressure distributions at three different locations within the cylindrical choke and just at the back of the choke outlet are measured in the same way as previous paper. As a result, the reason which cavitation performances indicate the phenomena according to shapes and sizes of cylindrical choke has been clarified in more detail as compared with the study before now.