Atypical start-up experiments on pump as turbine

At present, research on the characteristics of pumps as turbine (PATs) during the start-up process is still insufficient. To reveal the transient characteristics of a centrifugal PAT during the atypical start-up process, a test rig for the transient performance of the PAT was built; in addition, exp...

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Autores principales:	Yu-Liang Zhang, Yan-Juan Zhao
Formato:	article
Lenguaje:	EN
Publicado:	SAGE Publishing 2021
Materias:	Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/ea551cdc795a42d0b439772d5432d3dd
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id	oai:doaj.org-article:ea551cdc795a42d0b439772d5432d3dd
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spelling	oai:doaj.org-article:ea551cdc795a42d0b439772d5432d3dd2021-12-02T03:33:44ZAtypical start-up experiments on pump as turbine1687-814010.1177/16878140211062716https://doaj.org/article/ea551cdc795a42d0b439772d5432d3dd2021-11-01T00:00:00Zhttps://doi.org/10.1177/16878140211062716https://doaj.org/toc/1687-8140At present, research on the characteristics of pumps as turbine (PATs) during the start-up process is still insufficient. To reveal the transient characteristics of a centrifugal PAT during the atypical start-up process, a test rig for the transient performance of the PAT was built; in addition, experiments on the transient hydraulic performance of three kinds of steady speed and three kinds of steady flow were conducted. Through these experiments, the evolution characteristics of the transient performance parameters of the PAT during the atypical start-up process were analyzed over time. Moreover, three dimensionless coefficients were employed to deeply reveal the transient characteristics of the PAT during atypical start-up. Results showed that the rise curves of flow rate and outlet static pressure exhibited shock phenomena. With the increase in the stable running speed after start-up, the impact phenomenon of the outlet static pressure presented a delayed trend. The dimensionless head and flow coefficients reached the maximum value at the initial stage of the atypical start-up process and then rapidly dropped to the minimum value before slowly rising to the final stable value. The dimensionless power coefficient had a maximum value at the initial stage of atypical start-up and then rapidly dropped to the final stable value.Yu-Liang ZhangYan-Juan ZhaoSAGE PublishingarticleMechanical engineering and machineryTJ1-1570ENAdvances in Mechanical Engineering, Vol 13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Mechanical engineering and machinery TJ1-1570
spellingShingle	Mechanical engineering and machinery TJ1-1570 Yu-Liang Zhang Yan-Juan Zhao Atypical start-up experiments on pump as turbine
description	At present, research on the characteristics of pumps as turbine (PATs) during the start-up process is still insufficient. To reveal the transient characteristics of a centrifugal PAT during the atypical start-up process, a test rig for the transient performance of the PAT was built; in addition, experiments on the transient hydraulic performance of three kinds of steady speed and three kinds of steady flow were conducted. Through these experiments, the evolution characteristics of the transient performance parameters of the PAT during the atypical start-up process were analyzed over time. Moreover, three dimensionless coefficients were employed to deeply reveal the transient characteristics of the PAT during atypical start-up. Results showed that the rise curves of flow rate and outlet static pressure exhibited shock phenomena. With the increase in the stable running speed after start-up, the impact phenomenon of the outlet static pressure presented a delayed trend. The dimensionless head and flow coefficients reached the maximum value at the initial stage of the atypical start-up process and then rapidly dropped to the minimum value before slowly rising to the final stable value. The dimensionless power coefficient had a maximum value at the initial stage of atypical start-up and then rapidly dropped to the final stable value.
format	article
author	Yu-Liang Zhang Yan-Juan Zhao
author_facet	Yu-Liang Zhang Yan-Juan Zhao
author_sort	Yu-Liang Zhang
title	Atypical start-up experiments on pump as turbine
title_short	Atypical start-up experiments on pump as turbine
title_full	Atypical start-up experiments on pump as turbine
title_fullStr	Atypical start-up experiments on pump as turbine
title_full_unstemmed	Atypical start-up experiments on pump as turbine
title_sort	atypical start-up experiments on pump as turbine
publisher	SAGE Publishing
publishDate	2021
url	https://doaj.org/article/ea551cdc795a42d0b439772d5432d3dd
work_keys_str_mv	AT yuliangzhang atypicalstartupexperimentsonpumpasturbine AT yanjuanzhao atypicalstartupexperimentsonpumpasturbine
_version_	1718401766361399296

Atypical start-up experiments on pump as turbine

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