离心泵汽蚀过渡过程瞬态特性分析

王秀礼 1; 袁寿其 1; 朱荣生 1; 付强 1; 俞志君 2

您当前的位置：

首页 >

文章列表页 >

离心泵汽蚀过渡过程瞬态特性分析

更新时间：2025-07-09

- 离心泵汽蚀过渡过程瞬态特性分析
- Analysis on Transient Hydraulic Characteristics of Cavitation Process in Centrifugal Pumps
- 西安交通大学学报 2012年46卷第7期页码：38-43
- 作者机构：
  
  江苏大学流体机械工程技术研究中心,江苏,镇江,212013
- 作者简介：
- 基金信息：
  
  : 2011-11-24. 作者简介: 王秀礼(1982-),男,博士生;袁寿其(通信作者),男,教授,博士生导师. 基金项目: 国家杰出青年科学基金资助项目(50825902);国家科技支撑计划资助项目(2011BAF14B04);江苏省自然科学基金资助项目(BK2011504);江苏高校优势学科建设工程资助项目
- DOI：
  中图分类号： TH212;TH213.3
- 网络首发：2012-07-10，
  
  纸质出版：2012
- 稿件说明：
移动端阅览
王秀礼 1, 袁寿其 1, 朱荣生 1, 等. 离心泵汽蚀过渡过程瞬态特性分析[J]. 西安交通大学学报, 2012,46(7):38-43.

Analysis on Transient Hydraulic Characteristics of Cavitation Process in Centrifugal Pumps[J]. 2012, 46(7): 38-43.
王秀礼 1, 袁寿其 1, 朱荣生 1, 等. 离心泵汽蚀过渡过程瞬态特性分析[J]. 西安交通大学学报, 2012,46(7):38-43. DOI：

Analysis on Transient Hydraulic Characteristics of Cavitation Process in Centrifugal Pumps[J]. 2012, 46(7): 38-43. DOI：

摘要

为了对离心泵汽蚀过渡过程的瞬态水力特性进行分析

采用全汽蚀模型且不考虑水中溶解性气体对汽蚀的影响

再通过计算流体力学软件CFX对离心泵叶轮流道内汽蚀过渡过程进行了数值模拟计算

并与试验结果进行了对比.结果表明:数值模拟结果与试验结果的变化趋势基本一致

汽蚀过渡过程中叶片背面气体体积分数随汽蚀余量的降低而逐渐增大

当叶片工作面的气体体积分数大于0时

汽泡相开始堵塞叶轮流道

进而影响叶轮内部能量的交换和传递; 汽蚀引起的旋涡使得叶轮流道内的速度出现无规律波动

从而造成靠近旋涡区和叶片工作面通道内的速度和载荷增大; 扬程在随汽蚀余量的降低而缓慢降至一定程度后再次急剧下降

不同工况下扬程波动的幅度有所不同

小流量时扬程波动幅度最大.

Abstract

The full-cavitation model without considering the effect of the undissolved gas in water on cavitation was applied to study the transient hydraulic characteristics of the cavitation process in centrifugal pumps. The numerical simulation on vapor-liquid two-phase turbulence within whole flow passage of a centrifugal pump was performed by the computational fluid dynamics software CFX

and the comparison between the simulation results and the experimental data was conducted. The results show that the simulation results are in reasonable agreement with the experimental data. In the process of cavitation

the gas volume fraction at the blade back increases with the decrease in net positive suction head(NPSH). However

when the gas volume fraction at the working surface of the blade is greater than zero

the bubbles begin to clog the impeller channel

thus affecting the energy exchange and transfer in the impeller. The velocity within the impeller fluctuates irregularly due to the vortex caused by cavitation

leading to the increase in the velocity and load near the region of the vortex and in the channel of the blade working surface. Head decreases slowly to a certain extent and then declines sharply with the decrease in NPSH. In addition

the head fluctuation amplitude is different under different conditions and has a maximum value at the lower flow rate.

关键词

Keywords

references

ESCALER X, EGUSQUIZA E, FARHAT M, et al. Vibration cavitation detection using onboard measurements[C]∥5th International Symposium on Cavitation. Osaka,Japan: Osaka University, 2003:72-80.

LAHDELMA S,JUUSO E K. Vibration analysis of cavitation in Kaplan water turbine[C]∥17th IFAC World Congress.Amsterdam, Netherlands:Elsevier,2008: 180-186.

XAVIER E, EDUARD E, MOHAMED F, et al. Detection of cavitation in hydraulic turbines [J]. Mechanical Systems and Signal Processing, 2006,20(4): 983-1007.

KUBOTA A, KATO H, YAMAGUCHI H. Unsteady structure measurement of cloud cavitation on a foil section using conditional sampling technique[J]. ASME Journal of Fluids Engineering, 1989, 111(2): 204-210.

COCHARD H, HOLTTA T, HERBETTE S, et al. New insights into the mechanisms of water-stress-induced cavitation in conifers[J]. Plant Physiology, 2009,151(2):949-954.

段向阳, 王永生, 苏永生, 等.离心泵空化监测试验[J].振动测试与诊断, 2011,31(31):385-388.

DUAN Xiangyang, WANG Yongsheng, SU Yongsheng, et al. Experimental study of cavitation monitoring in centrifugal pump [J]. Journal of Vibration Measurement Diagnosis, 2011, 31(31):385-388.

张涛, 陈次昌,吕东莉,等. 含沙水流中空化促进磨损破坏机理 [J].排灌机械工程学报, 2011, 29(4):297-302.

ZHANG Tao, CHEN Cichang, LÜ Dongli,et al. Mechanism of silt abrasion enhanced by cavitation in silt laden water flow [J]. Journal of Drainage and Irrigation Machinery Engineering, 2011, 29(4):297-302.

谭磊, 曹树良, 桂绍波, 等.带有前置导叶离心泵空化性能的试验及数值模拟[J].机械工程学报,2010,46(18):177-182.

TAN Lei, CAO Shuliang, GUI Shaobo, et al. Experiment and numerical simulation of cavitation performance for centrifugal pump with inlet guide vane[J]. Journal of Mechanical Engineering, 2010,46(18):177-182.

黄彪, 王国玉, 权晓波, 等. 绕平头回转体非定常空化流体动力特性研究[J]. 实验流体力学,2011,25(2):22-28.

HUANG Biao, WANG Guoyu, QUAN Xiaobo, et al.Study on the unsteady cavitating flow dynamic characteristics around a 0-caliber ogive revolution body[J]. Journal of Experiments in Fluid Mechanics, 2011, 25(2):22-28.

张博, 王国玉, 黄彪, 等. 绕水翼空化非定常动力特性的时频分析 [J]. 实验流体力学, 2009, 23(3):44-49.

ZHANG Bo, WANG Guoyu, HUANG Biao,et al. Unsteady dynamics of cavitating flows around a hydrofoil [J].Journal of Experiments in Fluid Mechanics, 2009, 23(3):44-49.

SINGHAL A K, ATHAVALE M M, LI Huiying, et al. Mathematical basis and validation of the full cavitation model [J]. Transactions of the ASME: Journal of Fluids Engineering, 2002, 124(3):617-624.

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

液氢管路输运中静电积聚机理与电流密度分布特征研究

X射线辐照下聚酰亚胺材料空间电荷分布特性的数值模拟

异质裂隙内超临界CO2地热提取特性数值模拟研究

工质与叶轮传热对超临界二氧化碳向心透平气动性能与流动特性的作用机制

机翼近场尾流流动特性的附着涡模型分析