叶片开槽对轴流泵空化性能的影响

兰州理工大学学报 ›› 2022, Vol. 48 ›› Issue (4): 49-55.

叶片开槽对轴流泵空化性能的影响

赵伟国^*1,2, 薛子阳^1,2, 亢艳东^1,2, 程超^1,2, 李清华^1,2

1.兰州理工大学能源与动力工程学院, 甘肃兰州 730050;
2.兰州理工大学甘肃省流体机械及系统重点实验室, 甘肃兰州 730050

收稿日期:2021-03-19 出版日期:2022-08-28 发布日期:2022-10-09
通讯作者: 赵伟国(1979-),男,山东东营人,教授,博士.Email:zhaowg@zju.edu.cn
基金资助:
甘肃省自然基金(18JR3RA149),国家重点研发计划项目(2018YFB0606103)

Effect of slotted blade on cavitation performance of axial flow pump

ZHAO Wei-guo^1,2, XUE Zi-yang^1,2, KANG Yan-dong^1,2, CHENG Chao^1,2, LI Qing-hua^1,2

1. College of Energy and Power Engineering, LanzhouUniv. of Tech., Lanzhou 730050, China;
2. Key Laboratory of Fluid Machinery and System, Gansu Province, LanzhouUniv. of Tech., Lanzhou 730050, China

Received:2021-03-19 Online:2022-08-28 Published:2022-10-09

摘要/Abstract

摘要： 为探究开槽叶片对轴流泵空化性能的影响,以350ZQ-70-H型潜水轴流泵为研究对象,对其不同空化余量下的流场进行定常和非定常数值模拟,对比分析原模型与改进后模型的速度矢量分布、压力分布、内部空泡体积分数及空泡体积变化等.结果表明:开槽叶片可以改善轴流泵的效率和扬程,提升轴流泵性能;开槽叶片增大了叶片进口处流动面积,降低了叶片进口处流速,使得轴流泵叶轮内压力的分布得到改善,从而对空化产生抑制作用;在空化的各个阶段里,开槽模型的空泡体积分数分布均有所降低,其中空化初始阶段最为明显,相比原模型下降了30.4%,有效抑制了空化的发展,空化性能明显提升.

关键词: 轴流泵, 空化, 开槽叶片, 数值模拟

Abstract: In order to investigate the effect of the slotted blade on the cavitation control of the axial flow pump, the 350ZQ-70-H submersible axial flow pump is taken as the research object, and the flow field under different cavitation margins is simulated by steady and unsteady constant values. The velocity vector distribution, pressure distribution, internal void volume fraction and void volume change of the original model and the improved model are compared and analyzed. The results show that the slotted blade can improve the efficiency and head of the axial flow pump, and enhance the performance of the axial flow pump. The slotted blade increases the flow area at the blade inlet, reduces the flow velocity at the blade inlet, improves the pressure distribution in the axial flow pump impeller, and thus suppresses cavitation. In each stage of cavitation, the cavity volume fraction distribution of the slotted model is reduced, especially in the initial stage of cavitation, which is 30.4% lower than the original model, effectively inhibited the development of cavitation and significantly improved the cavitation performance.

Key words: axial flow pump;cavitation, slotted blade, numerical simulat

中图分类号:

TH312

赵伟国, 薛子阳, 亢艳东, 程超, 李清华. 叶片开槽对轴流泵空化性能的影响[J]. 兰州理工大学学报, 2022, 48(4): 49-55.

ZHAO Wei-guo, XUE Zi-yang, KANG Yan-dong, CHENG Chao, LI Qing-hua. Effect of slotted blade on cavitation performance of axial flow pump[J]. Journal of Lanzhou University of Technology, 2022, 48(4): 49-55.

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