Dynamic Pressure Test and Analysis of Marine Ballasted Centrifugal Pump under Rapid Changing Conditions

Ship ballast pumps have stringent requirements for their transient characteristics. Here, the pneumatic control valve and programmable logic controller (PLC) are applied to realize the rapid reduction in flow rate for ballast pumps, and the dynamic pressure of steady and transient conditions and inn...

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Autores principales:	Zhipeng Zhu, Houlin Liu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	ballast pump transient condition dynamic pressure experimental research inner flow Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/41f6c98de5184872b5b607b594efec8e
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spelling	oai:doaj.org-article:41f6c98de5184872b5b607b594efec8e2021-11-25T18:05:12ZDynamic Pressure Test and Analysis of Marine Ballasted Centrifugal Pump under Rapid Changing Conditions10.3390/jmse91112992077-1312https://doaj.org/article/41f6c98de5184872b5b607b594efec8e2021-11-01T00:00:00Zhttps://www.mdpi.com/2077-1312/9/11/1299https://doaj.org/toc/2077-1312Ship ballast pumps have stringent requirements for their transient characteristics. Here, the pneumatic control valve and programmable logic controller (PLC) are applied to realize the rapid reduction in flow rate for ballast pumps, and the dynamic pressure of steady and transient conditions and inner flow for the ballast pump are tested and analyzed. The results show that the dynamic pressure of each study scheme has cyclical increasing trends, however, the larger the amplitude of the flow rate reduction is, the greater the pressure increasing rate of the two measuring points. While the flow rate decreases to 0.4× <i>Q</i><sub>d</sub> and 0.2× <i>Q</i><sub>d</sub>, the rate of pressure increase is first fast and then slow. The dynamic pressure pulsation intensity is higher than the corresponding steady-state conditions after the transient conditions. With the increase in flow rate reduction, the characteristic frequencies of the dynamic pressure are 1APF (axial passing frequency) and 1BPF (blade passing frequency) and their harmonic frequency. The rapid decrease in flow rate causes the separation vortex in the impeller channel to be generated in advance, and the scale increases, which reduces the pulsation intensity of the pump outlet to prevent an increase in the level of broadband pulsation between 2APF and 1BPF.Zhipeng ZhuHoulin LiuMDPI AGarticleballast pumptransient conditiondynamic pressureexperimental researchinner flowNaval architecture. Shipbuilding. Marine engineeringVM1-989OceanographyGC1-1581ENJournal of Marine Science and Engineering, Vol 9, Iss 1299, p 1299 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ballast pump transient condition dynamic pressure experimental research inner flow Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
spellingShingle	ballast pump transient condition dynamic pressure experimental research inner flow Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Zhipeng Zhu Houlin Liu Dynamic Pressure Test and Analysis of Marine Ballasted Centrifugal Pump under Rapid Changing Conditions
description	Ship ballast pumps have stringent requirements for their transient characteristics. Here, the pneumatic control valve and programmable logic controller (PLC) are applied to realize the rapid reduction in flow rate for ballast pumps, and the dynamic pressure of steady and transient conditions and inner flow for the ballast pump are tested and analyzed. The results show that the dynamic pressure of each study scheme has cyclical increasing trends, however, the larger the amplitude of the flow rate reduction is, the greater the pressure increasing rate of the two measuring points. While the flow rate decreases to 0.4× <i>Q</i><sub>d</sub> and 0.2× <i>Q</i><sub>d</sub>, the rate of pressure increase is first fast and then slow. The dynamic pressure pulsation intensity is higher than the corresponding steady-state conditions after the transient conditions. With the increase in flow rate reduction, the characteristic frequencies of the dynamic pressure are 1APF (axial passing frequency) and 1BPF (blade passing frequency) and their harmonic frequency. The rapid decrease in flow rate causes the separation vortex in the impeller channel to be generated in advance, and the scale increases, which reduces the pulsation intensity of the pump outlet to prevent an increase in the level of broadband pulsation between 2APF and 1BPF.
format	article
author	Zhipeng Zhu Houlin Liu
author_facet	Zhipeng Zhu Houlin Liu
author_sort	Zhipeng Zhu
title	Dynamic Pressure Test and Analysis of Marine Ballasted Centrifugal Pump under Rapid Changing Conditions
title_short	Dynamic Pressure Test and Analysis of Marine Ballasted Centrifugal Pump under Rapid Changing Conditions
title_full	Dynamic Pressure Test and Analysis of Marine Ballasted Centrifugal Pump under Rapid Changing Conditions
title_fullStr	Dynamic Pressure Test and Analysis of Marine Ballasted Centrifugal Pump under Rapid Changing Conditions
title_full_unstemmed	Dynamic Pressure Test and Analysis of Marine Ballasted Centrifugal Pump under Rapid Changing Conditions
title_sort	dynamic pressure test and analysis of marine ballasted centrifugal pump under rapid changing conditions
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/41f6c98de5184872b5b607b594efec8e
work_keys_str_mv	AT zhipengzhu dynamicpressuretestandanalysisofmarineballastedcentrifugalpumpunderrapidchangingconditions AT houlinliu dynamicpressuretestandanalysisofmarineballastedcentrifugalpumpunderrapidchangingconditions
_version_	1718411612609576960

Dynamic Pressure Test and Analysis of Marine Ballasted Centrifugal Pump under Rapid Changing Conditions

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