带导叶离心泵内部旋转失速研究进展  

Overview of rotating stall in centrifugal pumps with vaned diffuser

作　　者：阳君 袁寿其[2] 裴吉[2] 张金凤[2] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013

出　　处：《排灌机械工程学报》2015年第5期369-373,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金："十二五"国家科技支撑计划项目(2011BAF14B04);国家自然科学基金资助项目(51349004)

摘　　要：带导叶离心泵的旋转失速现象严重制约了产品的安全性和稳定性.旋转失速随其传播方向不同主要分为正向旋转失速和反向旋转失速.研究表明,带导叶离心泵在小流量工况下易在叶轮进口处发生正向旋转失速,在近设计流量工况时则易在导叶流道内发生反向旋转失速,这2种失速都对泵的性能曲线产生较为明显的影响.目前国内外对带导叶离心泵的旋转失速的主要研究方法是CFD分析、PIV技术及压力脉动试验相结合,通过对泵内部流动结构变化和压力波动的频域及时频域分析以获得旋转失速的主要特征,包括失速频率、失速核的个数及传播速度等.但是失速团是怎样发生、发展的等问题都没有得到很好的解答,还需要进一步研究.Rotating stall phenomenon in centrifuge pumps with vaned diffhser restricts significantly their own operational safety and stability. The rotating stall can be classified into two groups according its propagation direction, namely the forward rotating stall and backward rotating stall. Normally, the forward rotating stall occurs easily in the inlet of impeller at part-load conditions, while the backward rotating stall happens in the diffuser channels near design condition. Both types of rotating stall can lead to a considerable influence on the pump performance curve. Presently,, CFD or PIV or unsteady pressure measurement is commonly used to study the rotating stall in a centrifugal pump with vaned diffuser in China and abroad in a combined manner. The characteristic parameters of rotating stall including frequency, number of stall cells and propagating speed etc. are obtained by conducting analyses of fluid velocity and pressure fluctuation signals in frequency and time domains respectively. However, how a rotating stall cell to occur and develop etc. in the pump remains unanswered. Thus for these problems a throughout experimental and analytical investigation is desirable.

关 键 词：带导叶离心泵 旋转失速 性能曲线 试验研究 数值模拟 

分 类 号：S277.9[农业科学—农业水土工程] TH311[农业科学—农业工程]