Research on Visualization of Inducer Cavitation of High-Speed Centrifugal Pump in Low Flow Conditions

Inducer is often used to improve the cavitation performance of pump. In order to study the cavitation characteristics of inducer under low flow condition of high-speed pump, high-speed photography technology was employed in this paper to carry out visual experiments on the inducer of a high-speed ce...

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Autores principales:	Zhenfa Xu, Fanyu Kong, Hongli Zhang, Kun Zhang, Jiaqiong Wang, Ning Qiu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	inducer cavitation visual experiments net positive suction head (NPSH) backflow vortex Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/dd9835026656454686308d7ad865d454
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spelling	oai:doaj.org-article:dd9835026656454686308d7ad865d4542021-11-25T18:04:37ZResearch on Visualization of Inducer Cavitation of High-Speed Centrifugal Pump in Low Flow Conditions10.3390/jmse91112402077-1312https://doaj.org/article/dd9835026656454686308d7ad865d4542021-11-01T00:00:00Zhttps://www.mdpi.com/2077-1312/9/11/1240https://doaj.org/toc/2077-1312Inducer is often used to improve the cavitation performance of pump. In order to study the cavitation characteristics of inducer under low flow condition of high-speed pump, high-speed photography technology was employed in this paper to carry out visual experiments on the inducer of a high-speed centrifugal pump. In low flow rates, Cavitation distribution and evolution among the inducer were captured. The experimental results revealed that a band-shaped backflow vortex in the inlet pipe would occur when the flow rate was less than 0.3 Q<sub>d</sub>. Moreover, the backflow vortex in the inlet pipe rotated with the inducer and the rotational speed of backflow vortex was approximately half of the inducer. The visualization test of 0.27 Q<sub>d</sub> was carried out: when the NPSH was greater than 6.72 m, the bubbles in the inlet pipe were asymmetrical; When the NPSH dropped to 5.41 m, the cavitation was becoming less asymmetrical; When NPSH dropped to 3.81 m, cavitation evolved to the deteriorating stage, plenty of bubbles entered into the main impeller, resulting in a rapid decline of pump performance. Furthermore, the cavitation performance was worse at an extreme flow rate, and the NPSH value of 0.27 Q<sub>d</sub> was 7.5% greater than that under design condition.Zhenfa XuFanyu KongHongli ZhangKun ZhangJiaqiong WangNing QiuMDPI AGarticleinducercavitationvisual experimentsnet positive suction head (NPSH)backflow vortexNaval architecture. Shipbuilding. Marine engineeringVM1-989OceanographyGC1-1581ENJournal of Marine Science and Engineering, Vol 9, Iss 1240, p 1240 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	inducer cavitation visual experiments net positive suction head (NPSH) backflow vortex Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
spellingShingle	inducer cavitation visual experiments net positive suction head (NPSH) backflow vortex Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Zhenfa Xu Fanyu Kong Hongli Zhang Kun Zhang Jiaqiong Wang Ning Qiu Research on Visualization of Inducer Cavitation of High-Speed Centrifugal Pump in Low Flow Conditions
description	Inducer is often used to improve the cavitation performance of pump. In order to study the cavitation characteristics of inducer under low flow condition of high-speed pump, high-speed photography technology was employed in this paper to carry out visual experiments on the inducer of a high-speed centrifugal pump. In low flow rates, Cavitation distribution and evolution among the inducer were captured. The experimental results revealed that a band-shaped backflow vortex in the inlet pipe would occur when the flow rate was less than 0.3 Q<sub>d</sub>. Moreover, the backflow vortex in the inlet pipe rotated with the inducer and the rotational speed of backflow vortex was approximately half of the inducer. The visualization test of 0.27 Q<sub>d</sub> was carried out: when the NPSH was greater than 6.72 m, the bubbles in the inlet pipe were asymmetrical; When the NPSH dropped to 5.41 m, the cavitation was becoming less asymmetrical; When NPSH dropped to 3.81 m, cavitation evolved to the deteriorating stage, plenty of bubbles entered into the main impeller, resulting in a rapid decline of pump performance. Furthermore, the cavitation performance was worse at an extreme flow rate, and the NPSH value of 0.27 Q<sub>d</sub> was 7.5% greater than that under design condition.
format	article
author	Zhenfa Xu Fanyu Kong Hongli Zhang Kun Zhang Jiaqiong Wang Ning Qiu
author_facet	Zhenfa Xu Fanyu Kong Hongli Zhang Kun Zhang Jiaqiong Wang Ning Qiu
author_sort	Zhenfa Xu
title	Research on Visualization of Inducer Cavitation of High-Speed Centrifugal Pump in Low Flow Conditions
title_short	Research on Visualization of Inducer Cavitation of High-Speed Centrifugal Pump in Low Flow Conditions
title_full	Research on Visualization of Inducer Cavitation of High-Speed Centrifugal Pump in Low Flow Conditions
title_fullStr	Research on Visualization of Inducer Cavitation of High-Speed Centrifugal Pump in Low Flow Conditions
title_full_unstemmed	Research on Visualization of Inducer Cavitation of High-Speed Centrifugal Pump in Low Flow Conditions
title_sort	research on visualization of inducer cavitation of high-speed centrifugal pump in low flow conditions
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/dd9835026656454686308d7ad865d454
work_keys_str_mv	AT zhenfaxu researchonvisualizationofinducercavitationofhighspeedcentrifugalpumpinlowflowconditions AT fanyukong researchonvisualizationofinducercavitationofhighspeedcentrifugalpumpinlowflowconditions AT honglizhang researchonvisualizationofinducercavitationofhighspeedcentrifugalpumpinlowflowconditions AT kunzhang researchonvisualizationofinducercavitationofhighspeedcentrifugalpumpinlowflowconditions AT jiaqiongwang researchonvisualizationofinducercavitationofhighspeedcentrifugalpumpinlowflowconditions AT ningqiu researchonvisualizationofinducercavitationofhighspeedcentrifugalpumpinlowflowconditions
_version_	1718411712222199808

Research on Visualization of Inducer Cavitation of High-Speed Centrifugal Pump in Low Flow Conditions

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