Experimental Characterization of Unsteady Forces Triggered by Cavitation on a Centrifugal Pump †

The paper presents an experimental campaign aimed at the characterization of the relationship between cavitation-induced instabilities and forces acting on the shaft, relevant to space application turbopumps. The experiments have been carried out on a six-bladed unshrouded centrifugal turbopump. Pre...

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Main Authors:	Dario Valentini, Giovanni Pace, Angelo Pasini, Ruzbeh Hadavandi, Luca d’Agostino
Format:	Article
Language:	English
Published:	MDPI AG 2018-05-01
Series:	International Journal of Turbomachinery, Propulsion and Power
Subjects:	cavitation rotordynamic centrifugal pump turbomachinery
Online Access:	http://www.mdpi.com/2504-186X/3/2/13

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spelling	doaj-d7c071aa90f747f8b1aab8edc3accdb42020-11-24T22:19:47ZengMDPI AGInternational Journal of Turbomachinery, Propulsion and Power2504-186X2018-05-01321310.3390/ijtpp3020013ijtpp3020013Experimental Characterization of Unsteady Forces Triggered by Cavitation on a Centrifugal Pump †Dario Valentini0Giovanni Pace1Angelo Pasini2Ruzbeh Hadavandi3Luca d’Agostino4Chemical Propulsion, SITAEL S.p.A., 56121 Pisa, ItalyChemical Propulsion, SITAEL S.p.A., 56121 Pisa, ItalyDepartment of Civil and Industrial Engineering, University of Pisa, 56122 Pisa, ItalyChemical Propulsion, SITAEL S.p.A., 56121 Pisa, ItalyDepartment of Civil and Industrial Engineering, University of Pisa, 56122 Pisa, ItalyThe paper presents an experimental campaign aimed at the characterization of the relationship between cavitation-induced instabilities and forces acting on the shaft, relevant to space application turbopumps. The experiments have been carried out on a six-bladed unshrouded centrifugal turbopump. Pressure fluctuations are analyzed in their frequency content for understanding the instability nature (axial, rotating) and their main characteristics (e.g., amplitude, rotating direction). The spectral analysis of the force components highlights a strong relationship of the z-component (along the rotating axis) with axial instabilities. On the other hand, rotating cavitation may involve force oscillations along all the three components leading to unwanted and dangerous fluctuating unbalances perpendicular to the rotating axis.http://www.mdpi.com/2504-186X/3/2/13cavitationrotordynamiccentrifugal pumpturbomachinery
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Dario Valentini Giovanni Pace Angelo Pasini Ruzbeh Hadavandi Luca d’Agostino
spellingShingle	Dario Valentini Giovanni Pace Angelo Pasini Ruzbeh Hadavandi Luca d’Agostino Experimental Characterization of Unsteady Forces Triggered by Cavitation on a Centrifugal Pump † International Journal of Turbomachinery, Propulsion and Power cavitation rotordynamic centrifugal pump turbomachinery
author_facet	Dario Valentini Giovanni Pace Angelo Pasini Ruzbeh Hadavandi Luca d’Agostino
author_sort	Dario Valentini
title	Experimental Characterization of Unsteady Forces Triggered by Cavitation on a Centrifugal Pump †
title_short	Experimental Characterization of Unsteady Forces Triggered by Cavitation on a Centrifugal Pump †
title_full	Experimental Characterization of Unsteady Forces Triggered by Cavitation on a Centrifugal Pump †
title_fullStr	Experimental Characterization of Unsteady Forces Triggered by Cavitation on a Centrifugal Pump †
title_full_unstemmed	Experimental Characterization of Unsteady Forces Triggered by Cavitation on a Centrifugal Pump †
title_sort	experimental characterization of unsteady forces triggered by cavitation on a centrifugal pump †
publisher	MDPI AG
series	International Journal of Turbomachinery, Propulsion and Power
issn	2504-186X
publishDate	2018-05-01
description	The paper presents an experimental campaign aimed at the characterization of the relationship between cavitation-induced instabilities and forces acting on the shaft, relevant to space application turbopumps. The experiments have been carried out on a six-bladed unshrouded centrifugal turbopump. Pressure fluctuations are analyzed in their frequency content for understanding the instability nature (axial, rotating) and their main characteristics (e.g., amplitude, rotating direction). The spectral analysis of the force components highlights a strong relationship of the z-component (along the rotating axis) with axial instabilities. On the other hand, rotating cavitation may involve force oscillations along all the three components leading to unwanted and dangerous fluctuating unbalances perpendicular to the rotating axis.
topic	cavitation rotordynamic centrifugal pump turbomachinery
url	http://www.mdpi.com/2504-186X/3/2/13
work_keys_str_mv	AT dariovalentini experimentalcharacterizationofunsteadyforcestriggeredbycavitationonacentrifugalpump AT giovannipace experimentalcharacterizationofunsteadyforcestriggeredbycavitationonacentrifugalpump AT angelopasini experimentalcharacterizationofunsteadyforcestriggeredbycavitationonacentrifugalpump AT ruzbehhadavandi experimentalcharacterizationofunsteadyforcestriggeredbycavitationonacentrifugalpump AT lucadagostino experimentalcharacterizationofunsteadyforcestriggeredbycavitationonacentrifugalpump
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Experimental Characterization of Unsteady Forces Triggered by Cavitation on a Centrifugal Pump †

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