Trawl-door Performance Analysis and Design Optimization with CFD

Eirikur Jonsson, Leifur Leifsson, Slawomir Koziel

2012

Abstract

Rising fuel prices and inefficient fishing gear are hampering the fishing industry. In this paper, we present a computational fluid dynamic (CFD) model to analyse the hydrodynamic performance of trawl-doors, which are a major contributor to the high fuel consumption of fishing vessels. Furthermore, we couple the CFD model with an efficient design optimization technique and demonstrate how to redesign the trawl-door shapes for minimum drag at a given lift. The optimization techinique is surrogate-based and employs a coarse discritization CFD model with relaxed convergence criteria. The surrogate model is constructed using the physics based low-fidelity model and space mapping. The CFD model is applied to the analysis of current trawl-door shapes and reveals that they are operated at low efficiency (with lift-to-drag ratios lower than 1), mainly due to massively separated flow. An example design optimization case study reveals that the angle of attack can be reduced significantly by re-positioning and tilting the leading-edge slats. The performance can be improved by as much as 24 times (attaining lift-ro-drag ratios around 24).

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Paper Citation


in Harvard Style

Jonsson E., Leifsson L. and Koziel S. (2012). Trawl-door Performance Analysis and Design Optimization with CFD . In Proceedings of the 2nd International Conference on Simulation and Modeling Methodologies, Technologies and Applications - Volume 1: SDDOM, (SIMULTECH 2012) ISBN 978-989-8565-20-4, pages 479-488. DOI: 10.5220/0004163904790488


in Bibtex Style

@conference{sddom12,
author={Eirikur Jonsson and Leifur Leifsson and Slawomir Koziel},
title={Trawl-door Performance Analysis and Design Optimization with CFD},
booktitle={Proceedings of the 2nd International Conference on Simulation and Modeling Methodologies, Technologies and Applications - Volume 1: SDDOM, (SIMULTECH 2012)},
year={2012},
pages={479-488},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004163904790488},
isbn={978-989-8565-20-4},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 2nd International Conference on Simulation and Modeling Methodologies, Technologies and Applications - Volume 1: SDDOM, (SIMULTECH 2012)
TI - Trawl-door Performance Analysis and Design Optimization with CFD
SN - 978-989-8565-20-4
AU - Jonsson E.
AU - Leifsson L.
AU - Koziel S.
PY - 2012
SP - 479
EP - 488
DO - 10.5220/0004163904790488