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Communication Dans Un Congrès Année : 2003

A numerical model to predict unsteady cavitating flow behaviour in inducer blade cascades

Résumé

The cavitation behaviour of a four-blade rocket engine turbopump inducer is simulated. A 2D numerical model of unsteady cavitation was applied to a blade cascade drawn fromthe inducer geometry. The physical model is based on a homogeneous approach of cavitation, coupled with a barotropic state law for the liquid/vapour mixture. The numericalresolution uses a pressure-correction method derived from the SIMPLE algorithm and a finite volume discretization. Unsteadybehaviour of sheet cavities attached to the blade suction side depends on the flow rate and cavitation number. Two differentunstable configurations of rotating cavitation, respectively sub-synchronous and super-synchronous, are identified. The mechanisms that are responsible for these unstable behaviours are discussed, and the stress fluctuations induced on the blade by the rotating cavitation are estimated.
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Dates et versions

hal-00211981 , version 1 (11-01-2020)

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Olivier Coutier-Delghosa, Jérôme Perrin, Regiane . Fortes Patella, Jean-Luc Reboud. A numerical model to predict unsteady cavitating flow behaviour in inducer blade cascades. CAV 2003 Symposium, Nov 2003, Osaka, Japan. ⟨hal-00211981⟩
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