Numerical Study of Blade Loading Effects on Tip Leakage Flow in Axial-flow Pump

被引：0

作者：

Yang W. ^{[1
,2
]}

Yang K. ^{[1
]}

Fu Z. ^{[1
]}

Wu J. ^{[3
]}

机构：

[1] College of Water Resources and Civil Engineering, China Agricultural University, Beijing

[2] Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System, Beijing

[3] Sany Heavy Machinery Co., Ltd., Kunshan

来源：

Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | 2022年 / 53卷 / 06期

关键词：

Axial-flow pump; Blade loading; Numerical simulation; Pressure fluctuation; Tip leakage vortex;

D O I：

10.6041/j.issn.1000-1298.2022.06.018

中图分类号：

学科分类号：

摘要：

The tip leakage flow of axial-flow pump has an important influence on the internal and external characteristics of the pump. The relationship between the blade loading distribution patterns and tip leakage flow was established from the perspective of controlling the blade load. Based on the three-dimensional inverse problem design method, the impeller models of axial-flow pump with three typical blade loading distribution patterns of front load, middle load and after load at the blade tip were obtained. The influence of the blade loading distribution on tip leakage flow and induced leakage vortex flow of the axial-flow pump was studied based on three-dimensional turbulence simulation technique. It was found that compared with the front-loading type impeller and the middle-loading type impeller, the after-loading type impeller can effectively eliminate the low-pressure area near the blade inlet, which was beneficial to the cavitation performance of the impeller. The external performance simulation results showed that the pump performance was improved at the small flow rate and the hump phenomenon of the discharge-head characteristic curve was effectively suppressed, which was consistent with the experiment results. At the same time, the impeller with after load had better pressure pulsation performance under the condition of small flow rate. © 2022, Chinese Society of Agricultural Machinery. All right reserved.

引用

页码：177 / 183

页数：6

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