Improving accuracy and efficiency of CFD predictions of propeller open water performance

Dublin Core

Title

Improving accuracy and efficiency of CFD predictions of propeller open water performance

Subject

CFD
RANS methods
mesh optimization
design of experiments
propulsive characteristics
propeller thrust and torque

Description

This research proposes mesh and domain optimization strategies for a popular Computational Fluid Dynamics (CFD) technique to estimate the open water propulsive characteristics of fixed pitch propellers accurately and time-efficiently based on examining the effect of various mesh and computation domain parameters. It used a Reynolds-Averaged Navier-Stokes (RANS) solver to predict the propulsive performance of a fixed pitch propeller with varied meshing, simulation domain and setup parameters. The optimized mesh and domain size parameters were selected using Design of Experiments (DoE) methods enabling simulations in a limited memory and in a timely manner without compromising the accuracy of results. The predicted thrust and torque for the propeller were compared to the corresponding measurements for determining the prediction accuracy. The authors found that the optimized meshing and setup arrangements reduced the propeller opens simulation time by at least a factor of six as compared to the generally popular CFD parameter setup. In addition, the accuracy of propulsive characteristics was improved by up to 50% as compared to published simulation results. The methodologies presented in this paper can be similarly applied to other simulations such as calm water ship resistance, ship propulsion etc. to systematically derive the optimized meshing arrangement for simulations with minimal simulation time and maximum accuracy. This investigation was carried out using a commercial CFD package; however, the findings can be applied to any RANS solver.

Creator

Islam, Mohammed
Jahra, Fatima

Source

Journal of Naval Architecture and Marine Engineering; Vol. 16 No. 1 (2019); 1-20
2070-8998
1813-8535

Publisher

Association of Naval Architects and Marine Engineers

Date

2019-06-24

Rights

Copyright (c) 2019 Journal of Naval Architecture and Marine Engineering

Relation

Format

application/pdf

Language

eng

Type

info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion

Identifier

Citation

Mohammed Islam and Fatima Jahra, Improving accuracy and efficiency of CFD predictions of propeller open water performance, Association of Naval Architects and Marine Engineers, 2019, accessed November 7, 2024, https://igi.indrastra.com/items/show/3299

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