叶片数对离心泵叶轮失速特性影响研究

doi:10.3901/JME.2016.10.207

机械工程学报 ›› 2016, Vol. 52 ›› Issue (10): 207-212.doi: 10.3901/JME.2016.10.207

• 交叉与前沿 • 上一篇

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叶片数对离心泵叶轮失速特性影响研究

周佩剑^{1, 2}, 王福军¹, 姚志峰¹

1. 中国农业大学水利与土木工程学院北京 100083;
2. 浙江工业大学机械工程学院杭州 310014

出版日期:2016-05-15 发布日期:2016-05-15
作者简介:周佩剑,男,1986年出生,博士,讲师。主要从事水动力学与水力机械研究。E-mail：peijian13@163.com;王福军(通信作者),男,1964年出生,博士,教授,博士研究生导师。主要从事水动力学与水力机械研究。E-mail：wangfj@cau.edu.cn
基金资助:
国家自然科学基金重点(51139007,51321001)和国家科技支撑计划(2015BAD20B01)资助项目

Study on Effects of Blade Number on Stall Characteristics for Centrifugal Pump Impeller

ZHOU Peijian^{1, 2}, WANG Fujun¹, YAO Zhifeng¹

1. College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083;
2. College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014

Online:2016-05-15 Published:2016-05-15

摘要/Abstract

摘要： 为研究叶片数对离心泵叶轮失速特性的影响,以4种不同叶片数的离心泵叶轮为研究对象,采用改进的亚格子模型(Sub-grid scale model, SGS)对叶轮的内部流场进行数值模拟,得到不同叶片数的失速团的运动规律,以及失速频率、失速团个数、转速等特性参数。研究表明,叶片数对叶轮内部失速团的类型有显著影响,当叶片数为偶数时,会发生“交替失速”流动现象;当叶片数为奇数时,会发生“旋转失速”流动现象。另外,叶片数对失速团特征参数也有一定影响。当发生“交替失速”时,叶片数增多,失速团的数量也随之增多,失速频率也随之变化,4叶片叶轮失速团的失速频率约是6叶片的2.4倍;而当发生“旋转失速”时,叶片数增多,失速团的数量也随之增多,转速也随之增大,7叶片叶轮失速团的转速约是5叶片的1.8倍,失速频率是它的3.8倍。

关键词: 交替失速, 离心泵, 旋转失速, 叶片数

Abstract: In order to investigate the effects of blade number on stall characteristics for a centrifugal pump impeller, a developed Sub-grid scale model is applied to a centrifugal pump impeller with different blade number. The motion rule and characteristic parameters of stall cells are obtained, including the number, stall frequency and rotation speed. The results show that the blade number has significant effects on stall types. As the blade number is even, the alternative stall phenomenon occurs. Otherwise, when it is odd, the rotating stall phenomenon appears. Furthermore, the blade number also has influence on the characteristic parameters of stall cells. Under the alternative stall condition, as the increase of blade number, the number of stall cells increases, while the stall frequency decreases. The stall frequency of 4 blades is 2.4 times as large as that of 6 blades. Under the rotating stall condition, with the increase of blade number, the number of stall cells also increased. The speed of stall cells of the impeller with 7 blades is 1.8 times as fast as that with 5 blades. The stall frequency of 7 blades is 3.8 times as large as that with 5 blades.

Key words: alternative stall, blade number, centrifugal pump, rotating stall

中图分类号:

TH311

周佩剑, 王福军, 姚志峰. 叶片数对离心泵叶轮失速特性影响研究[J]. 机械工程学报, 2016, 52(10): 207-212.

ZHOU Peijian, WANG Fujun, YAO Zhifeng. Study on Effects of Blade Number on Stall Characteristics for Centrifugal Pump Impeller[J]. Journal of Mechanical Engineering, 2016, 52(10): 207-212.

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叶片数对离心泵叶轮失速特性影响研究

Study on Effects of Blade Number on Stall Characteristics for Centrifugal Pump Impeller

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