External Characteristics and Internal Flow Features of a Centrifugal Pump during Rapid Startup

作     者：ZHU Zuchao GUO Xiaomei CUI Baoling LI Yi 

作者机构：Laboratory of Fluid Power Transmission Zhejiang Sci-Tech University Hangzhou 310018 China Mechanical and Electronic Engineering Department Zhejiang Water Conservancy and Hydropower College Hangzhou 310018 China 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2011年第24卷第5期

页      面：798-804页

核心收录：

学科分类：080704[工学-流体机械及工程] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0802[工学-机械工程] 0835[工学-软件工程] 0811[工学-控制科学与工程] 0801[工学-力学（可授工学、理学学位）] 081202[工学-计算机软件与理论] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by National Natural Science Foundation of China (Grant No. 50879080, Grant No. 50609025) Zhejiang Provincial Natural Science Foundation of China (Grant No. Y1100013,Grant No. R1100530) 

主　　题：centrifugal pump numerical calculation transient condition startup 

摘      要：Centrifugal pumps always work under steady conditions,and many researches focus on the steady *** transient conditions,such as sudden startup and shutdown,are *** researches on the inner flow of centrifugal pumps under transient conditions have been done,and they show that the transient operation is different from the steady *** order to research the evolution of unsteady flow in a centrifugal pump under transient conditions,and to investigate the mechanism of transient effects by analyzing the unsteady flow in a centrifugal pump,the external characteristic experiment and the internal flow numerical calculation of the centrifugal pump with an open impeller during startup is *** relationships of the rotation speed,capacity and head between start-time are obtained by the external characteristics *** numerical calculations under startup process are carried out by using the k-e model and N-S *** distribution of velocity and pressure in the inner channel of the tested pump was obtained by choosing fourteen start-time points and twelve geometrical points in the impeller channel during *** calculation results show that the velocity and the pressure increase linearly with the start-time before rotation＇s speed gets steady,then changes almost horizontally after rotation speed becomes steady,then fluctuates until being *** internal flow characteristics are in good agreement with the external characteristic experimental results and numerical *** simulation methods and results make the basis for the diagnosis and optimization of under flow in the centrifugal pump during transient operation.