engleski

A Multi-Phase CFD Framework for Predicting Performance of Marine Propulsors

This paper is concerned with a computational fluid dynamics (CFD) framework that has been developed to provide a high-fidelity prediction capability for single- and multi-phase turbulent flows in and around marine propulsors. The computational framework consists of a suite of application (Navier-Stokes) solvers and a number of numerics and physical model libraries built around an object-oriented CFD tool-kit written in C++. These applications solvers adopt computational techniques specially designed for turbomachinery applications such as rotating frame-of-reference, arbitrary Lagrangian-Eulerian (ALE) approach on moving mesh, rotationally cyclic boundaries, and grid-to-grid interface (GGI) algorithm. Turbulence can be modeled using a choice from Reynolds-averaged Navier-Stokes (RANS) turbulence models, subgrid-scale turbulence models for large eddy simulation (LES), or using a RANS/LES hybrid approach. The framework offers a multiphase modeling capability based on a discrete bubble model (DBM) and a continuum mixture-based cavitation model. The key components of the computational framework are described in detail with emphasis on their object-oriented implementations. Several examples of the applications computed using the framework are presented including cavitating flow on a hydrofoil, single-phase and cavitating flow on an open propeller and a waterjet propulsor.

OpenFOAM; CFD; turbomachinery

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