Influence of outlet angle in low-solidity fan-type inducers on improvement of cavitation instability phenomena

Abstract

The objective of this paper is to clarify the effect of different inducer outlet angle from view of the suppressing cavitation instability. Pumps for transferring liquefied natural gas require low NPSHR and stability over a wide flow range. Low-solidity fan-type inducers installed to improve suction performance, cavitation instability flow phenomena have been observed at low flow ranges. In this study, for the purpose of establishing design guidelines for low solidity inducers, the effect of outlet angle on cavitation instability phenomena was investigated with the fixed inlet angle of the inducer.