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Analysis of Cavitation Instabilities in a Four-Blade Inducer

Article dans une revue avec comité de lecture
Author
COUTIER-DELGOSHA, Olivier
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]
DAZIN, Antoine
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]
CAIGNAERT, Guy
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]
BOIS, Gérard
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]

URI
http://hdl.handle.net/10985/6819
DOI
10.1155/2012/213907
Date
2012
Journal
Analysis of Cavitation Instabilities in a Four-Blade Inducer

Abstract

The cavitating behavior of a four-blade inducer tested in the LML laboratory large test facility is considered in the present paper. Experimental investigations based on unsteady pressure measurements and records from a six-component balance mounted on the inducer shaft are performed. Spectral analysis of the signals enables to detect several characteristic frequencies related to unbalanced two-phase flow patterns. The objective of the present paper is the understanding of the physical phenomena associated to these frequencies. Therefore, wavelet decomposition, flow visualizations, and direct analysis of the high-frequency force, moment, and pressure signals are applied. Results at nominal flow rate only are considered. Not only classical unbalanced cavitation patterns, but also unexpected flow organizations are discussed.

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