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Rotating instabilities in a radial vaneless diffuser. part II : Comparison of experimental and numerical results

type de publication      communication internationale avec actes publiés
date de publication 2009
auteur(s) Cavazzini Giovanna; Dazin Antoine; Pavesi Giogio; Dupont Patrick; Ardizzon Guido; Caignaert Guy; Bois Gérard
conférence 8th European Conference on Turbomachinery
     dates de 23-03-2009 à 27-03-2009
     lieu Graz (Autriche)
     nom des actes Euroturbo 8 (Conference Proceedings)
pages 1005 – 1014
résumé The paper refers to the behaviour of the vaneless diffuser of a radial flow pump in partial flow operating conditions. Numerical data obtained with the help of the CFX computer code are compared with the experimental results (high speed PIV and unsteady pressure measurements) presented in the first part of this paper. Averaged results and Fourier spectra are compared, as well as the flow patterns associated with a rotating instability occurring at this flow rate. The numerical data are also used to analyse the flow behaviour at this flow rate.
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