公开(公告)号：JPS62692A

公开(公告)日：1987-01-06

申请号：JP13813285

申请日：1985-06-25

Applicant: NAT AEROSPACE LAB

Inventor： KAMIJO KENJIRO ,  YAMADA HITOSHI

IPC: F04D29/18

Abstract: PURPOSE:To enable suction of gas-liquid two-phase fluid by providing an inducer with a pressure boosting ability which is obtained by multiplying a coefficient by a difference between a necessary suction pressure for a main impeller to suck only liquid composition of sucked fluid and a necessary suction pressure for the inducer. CONSTITUTION:An inducer 3 is provided with a pressure boosting ability obtained by multiplying a coefficient 2 by a difference between a necessary suction pressure for a main impeller 4 to suck only liquid composition of sucked fluid and a necessary suction pressure for the inducer 3 and is designed so that the attack angle of the inducer 3 is zero when a void rate is 40%. Even if the volmetric flow rate of gas which flows into a pump 1 occupies 30-50% with respect to the entire inlet volumetric flow rate of the pump, pressure increasing ratio at the main impeller 4 may be varied hardly. The inducer- mounted centrifugal pump of this invention therefore sucks gas-liquid double- phase flow sufficiently for the purpose of pressure increase.