CFD simulations of two-phase propeller flows at different Reynolds numbers

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Abstract

In this paper, we utilized numerical simulations to investigate single- and two-phase viscous flows around marine propellers in open-water conditions at different Reynolds number regimes. The simulations were carried out using a homogeneous two-phase flow model with RANS and hybrid RANS/LES turbulence modelling approaches. Transition was accounted for in the model-scale simulations by employing a transition model. Both steady and unsteady propeller cavitation were investigated.
We considered two types of marine propellers: a conventional and a tip-loaded one. We compared the results of the simulations to experiments in terms of global propeller performance and cavitation observations. The propeller global forces, cavitation, near-blade flow phenomena and the wake flow characteristics were investigated in model- and full-scale.
The model-scale propeller performance characteristics and the cavitation patterns were captured well with the numerical simulations. The simulated global propeller performance and the cavitation structures were mainly similar between the model- and full-scale conditions. We observed a tendency of increased cavitation extent as the Reynolds number increased, both in steady and unsteady cases. At the same time, greater dissipation of vortex cavitation and unsteady cavitation structures was noted in the full-scale conditions.
Original languageEnglish
Number of pages14
Publication statusPublished - Nov 2019
MoE publication typeNot Eligible
EventAVT-307 Research Symposium, Separated Flow: Prediction, Measurement and Assessment for Air and Sea Vehicles - Trondheim, Norway
Duration: 7 Oct 20199 Oct 2019

Conference

ConferenceAVT-307 Research Symposium, Separated Flow
CountryNorway
CityTrondheim
Period7/10/199/10/19

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  • Cite this

    Viitanen, V., Siikonen, T., & Sanchez Caja, A. (2019). CFD simulations of two-phase propeller flows at different Reynolds numbers. Paper presented at AVT-307 Research Symposium, Separated Flow, Trondheim, Norway.