The paper refers to the vaneless diffuser flow analysis 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 measure-ments) presented in the first part of this paper. Averaged results and Fourier spectra are com-pared, 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.

Rotating Instabilities in a Radial Vaneless Diffuser. Part II: Comparison of Experimental and Numerical Results

CAVAZZINI, GIOVANNA;PAVESI, GIORGIO;ARDIZZON, GUIDO;
2009

Abstract

The paper refers to the vaneless diffuser flow analysis 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 measure-ments) presented in the first part of this paper. Averaged results and Fourier spectra are com-pared, 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.
2009
Proceedings of 8th Conference on Turbomachinery, Fluid Dynamics and Thermodynamics
9783851250367
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2439213
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