Centrifugal pumps are essential components in various industrial applications, where their stable and efficient operation is critical. The impeller, a key part of these pumps, plays a pivotal role in energy conversion; thus, any fracture in its blades can significantly impact the pump's performance. This study investigates the effects of a single-blade trailing edge fracture on the flow characteristics of a centrifugal pump, aiming to provide insights into fault diagnosis and performance optimization. By employing a combination of experimental analysis and numerical simulation, the study analyzes changes in pump performance, pressure distribution, vortex structures, entropy production, blade loading, transient radial force, and pressure pulsation. The results indicate that minor blade fractures have minimal impact on the pump's head and efficiency, while severe fractures cause a noticeable decrease in head across all flow rates, with efficiency remaining relatively stable at low-flow rates. Transient analyses reveal that blade fractures alter the distribution and magnitude of radial forces, leading to changes in pressure pulsation characteristics, with the shaft passing frequency amplitude increasing and gradually surpassing the blade passing frequency amplitude. These findings provide important references for diagnosing fluid-induced centrifugal pump failures, effectively enabling the extraction of hydraulic features to optimize the fault diagnosis process.
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October 2024
Research Article|
October 03 2024
Effect of single blade trailing edge side fracture on flow characteristics of centrifugal pump
Huairui Li (李怀瑞)
;
Huairui Li (李怀瑞)
(Data curation, Formal analysis, Investigation, Software, Writing – original draft)
1
National Research Center of Pumps, Jiangsu University
, Zhenjiang 212013, China
2
The Joint Lab of Intelligent O & M for NPP Pump
, Zhenjiang 212013, China
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Rongyong Zhang (张荣勇)
;
Rongyong Zhang (张荣勇)
(Supervision)
2
The Joint Lab of Intelligent O & M for NPP Pump
, Zhenjiang 212013, China
3
China Nuclear Power Engineering Co Ltd
., Beijing 100840, China
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Huazheng Chen (陈华铮)
;
Huazheng Chen (陈华铮)
(Formal analysis)
1
National Research Center of Pumps, Jiangsu University
, Zhenjiang 212013, China
2
The Joint Lab of Intelligent O & M for NPP Pump
, Zhenjiang 212013, China
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Yingqian Liu (柳应倩)
;
Yingqian Liu (柳应倩)
(Software)
1
National Research Center of Pumps, Jiangsu University
, Zhenjiang 212013, China
2
The Joint Lab of Intelligent O & M for NPP Pump
, Zhenjiang 212013, China
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Fudong Tao (陶付东)
;
Fudong Tao (陶付东)
(Software)
1
National Research Center of Pumps, Jiangsu University
, Zhenjiang 212013, China
2
The Joint Lab of Intelligent O & M for NPP Pump
, Zhenjiang 212013, China
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Qiang Fu (付强)
;
Qiang Fu (付强)
(Supervision)
1
National Research Center of Pumps, Jiangsu University
, Zhenjiang 212013, China
2
The Joint Lab of Intelligent O & M for NPP Pump
, Zhenjiang 212013, China
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Rongsheng Zhu (朱荣生)
Rongsheng Zhu (朱荣生)
a)
(Supervision)
1
National Research Center of Pumps, Jiangsu University
, Zhenjiang 212013, China
2
The Joint Lab of Intelligent O & M for NPP Pump
, Zhenjiang 212013, China
a)Author to whom correspondence should be addressed: ujs_zrs@163.com
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a)Author to whom correspondence should be addressed: ujs_zrs@163.com
Physics of Fluids 36, 105127 (2024)
Article history
Received:
July 24 2024
Accepted:
September 09 2024
Citation
Huairui Li, Rongyong Zhang, Huazheng Chen, Yingqian Liu, Fudong Tao, Qiang Fu, Rongsheng Zhu; Effect of single blade trailing edge side fracture on flow characteristics of centrifugal pump. Physics of Fluids 1 October 2024; 36 (10): 105127. https://doi.org/10.1063/5.0230539
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