抄録
Turbo-pumps have recently been utilized in various industrial fields for reasons of high efficiency and easy maintenance, in place of positive displacement pumps. A pump head degradation due to a two-phase flow comes up as an important engineering problem with the diversification of applications and operating fluids. The objectives of this paper, consisting of this report and the other, are first to review the past research on gas-liquid two-phase flow pump performance, secondly to discuss two-phase flow dynamics in the rotating flow passages and to describe a conceptual view and the present situation for designing two-phase flow pumps. In this report, the transition of two-phase flow problems in pumps are briefly reviewed and the head degradations, associated with various gas phase behaviors in a centrifugal pump, are illustrated to deepen the reader's understanding. Then, the existing methods based on some analytical models for predicting pump performance are described.
