La Houille Blanche
Number 7-8, Décembre 1992
|Page(s)||647 - 650|
|Published online||01 October 2009|
Cavitation d'entrefer dans les machines hydrauliques
Tip clearance cavitation in hydraulic machines
a.c.b.-CERG, rue Lavoisier, 38800 Le Pont de Claix
2 Laboratoire des Ecoulements Géophysiques et Industriels/IMG, BP 53X, 38041 Grenoble Cedex
Experimental results obtained at ACB-CERG concerning tip clearance and vortex cavitation in a pump type rotating machine are presented. The effects of tip clearance geometry, tip clearance gap, blade geometry and pressure gradient between blade and suction faces on these two types of cavitation are considered. The facility also allows to modify the boundary layer structure on the ring belt as well as to control the spectra of cavitation nuclei inside the test section. The analysis relies on visualisations of cavitation patterns and on pressure measurements on the wall of the ring bell.
© Société Hydrotechnique de France, 1992
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