A numerical model to predict unsteady cavitating flow behaviour in inducer blade cascades
Abstract
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.
Cite
@article{arxiv.2001.10345,
title = {A numerical model to predict unsteady cavitating flow behaviour in inducer blade cascades},
author = {Olivier Coutier-Delghosa and Jérôme Perrin and Régiane Fortes Patella and Jean-Luc Reboud},
journal= {arXiv preprint arXiv:2001.10345},
year = {2020}
}
Comments
CAV 2003 Symposium, Nov 2003, Osaka, Japan