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Open AccessArticle

Detection of the Flow State for a Centrifugal Pump Based on Vibration

1
Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua University, Chengdu 610039, China
2
Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
3
National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
*
Authors to whom correspondence should be addressed.
Energies 2019, 12(16), 3066; https://doi.org/10.3390/en12163066
Received: 6 July 2019 / Revised: 30 July 2019 / Accepted: 7 August 2019 / Published: 9 August 2019
A combined numerical and experimental method study was performed to detect the inner flow state for a type of centrifugal pump. It was found that the inlet attack angles of blades in an impeller have a great influence on the flow instabilities in a centrifugal pump. The mechanism of the rotating stall in the impeller channel was explained. Meanwhile, flow state identification with vibration (FSIV) was proposed to detect the flow instabilities in a centrifugal pump. The relationship between the external vibration and the inner flow state has been established by FSIV. The characteristics and mechanism of the vibration produced by the flow instabilities in a centrifugal pump were investigated. It was found that the hump, the rotating stall, the backflow, the occurrence of unstable flow, and the cavitation in the centrifugal pump can be effectively detected by applying the vibration signals, which helps to obtain safe and steady operating conditions for the system. View Full-Text
Keywords: centrifugal pump; flow instabilities; experiment; vibration; detection centrifugal pump; flow instabilities; experiment; vibration; detection
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MDPI and ACS Style

Lu, J.; Liu, X.; Zeng, Y.; Zhu, B.; Hu, B.; Yuan, S.; Hua, H. Detection of the Flow State for a Centrifugal Pump Based on Vibration. Energies 2019, 12, 3066.

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