Effect of cavitation on pressure pulsation characteristics of an axial-flow pump under sand conditions

被引：0

作者：

Lin P. ^{[1
,2
,3
]}

Xiang L. ^{[1
]}

Hu D. ^{[1
]}

Zhai S. ^{[2
]}

Guo P. ^{[3
]}

Wang S. ^{[1
]}

机构：

[1] School of Energy and Mechanical Engineering, Hunan University of Humanities, Science and Technology, Loudi

[2] Ningbo Jushen Pumps Industry Co., Ltd., Ningbo

[3] School of Water Conservancy and Hydropower, Xi'an University of Technology, Xi'an

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2021年 / 40卷 / 18期

关键词：

Axial-flow pump; Cavitation characteristics; Cavitation under sand condition; Numerical simulation; Pressure pulsation;

D O I：

10.13465/j.cnki.jvs.2021.18.019

中图分类号：

学科分类号：

摘要：

In order to clarify the influences of sediment concentration, particle size, cavitation and other factors on the internal pressure pulsation characteristics of an axial-flow pump, the SST k-ω turbulence model was adopted to do a simulation on the internal pressure pulsation characteristics under the conditions of clear water, sandy water, cavitation and cavitation under sand. The results show that the addition of sediment will increase the pressure pulsation and promote the development of cavitation.The pulsation coefficient at the impeller outlet is greater than that at the inlet. In addition to cavitation, the dynamic and static interference between the impeller and the guide vane is a major factor in causing pressure pulsation, and cavitation will further increase the pressure pulsation and adversely affect the vibration of the pump.The main frequency components of the vibration signal induced by pressure pulsation include those of 2.5 Hz, 10 Hz and 20 Hz, which are consistent with the pump frequency of 2.5 Hz, the leaf frequency of 10 Hz and its second harmonic frequency of 20 Hz. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.

引用

页码：140 / 147

页数：7

共 28 条

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