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

Autor:	Coutier-Delghosa, Olivier, Perrin, Jérôme, Patella, Régiane Fortes, Reboud, Jean-Luc
Rok vydání:	2020
Předmět:	Physics - Fluid Dynamics
Druh dokumentu:	Working Paper
Popis:	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. Comment: CAV 2003 Symposium, Nov 2003, Osaka, Japan
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2001.10345 Zobrazit plný text záznamu View this record from Arxiv