Abstract
In order to establish criteria for acceptable erosion, cavitation pitting tests have been performed on several pumps using soft material polished inserts. We present here the results obtained for the SHF centrifugal pump for a range of flowrate from 0.3 to 1.3 Qn. The extent of the pitted zone is recorded and related to the cavity visualization. The pitting is measured using a laser profilometer and quantified by the pitting velocity value, which compares cavitation intensity of each operating condition of the pump. The visualizations are also compared to numerical predictions with CFX.-TASC flow: the cavity sheet development is well predicted by the calcutations.
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