关键词: 离心泵;非定常流;性能分析;发动机燃料系统;冲压式喷气发动机

Abstract: This paper presents some advances in the study of centrifugal pump performance under pure liquid phase transient flow conditions. Special attention is devoted to the analysis of the mechanism of pump under gas-liquid two phase transient flow conditions. Some research work on the fluid transients in turbopump for a ramjet fuel system done in 31st Research Lab. of Ministry of Aerospace Industry of China are also introduced.The major results of this research show:a) the transient behaviour of centrifugal pump is one of its significant characteristics; b)it is impossible to discuss the transient behaviour of a pump without linking with its own system; c) in the unsteady flow phenomena, to distinguish the "rapid transient" from "slow transient" is important both in theory and in practice.

Key words: Centrifugal pump;Unsteady flow;Performance analysis;Engine fuel system;Ramjet engine