Trawl-door Performance Analysis and Design Optimization with CFD

Eirikur Jonsson, Leifur Leifsson, Slawomir Koziel

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).

References

  1. Abbott, I. and Von Doenhoff, A. (1959). Theory of wing sections: including a summary of airfoil data. Dover Pubns.
  2. Alexandrov, N. and Lewis, R. (2001). An overview of firstorder model management for engineering optimization. Optimization and Engineering, 2(4):413-430.
  3. ANSYS (2010). ANSYS FLUENT Theory Guide. ANSYS, Southpointe 275 Thecnology Drive Canonburg PA 15317, release 13.0 edition.
  4. Bandler, J., Cheng, Q., Dakroury, S., Mohamed, A., Bakr, M., Madsen, K., and Sondergaard, J. (2004). Space mapping: the state of the art. Microwave Theory and Techniques, IEEE Transactions on, 52(1):337-361.
  5. Forrester, A. and Keane, A. (2009). Recent advances in surrogate-based optimization. Progress in Aerospace Sciences, 45(1-3):50-79.
  6. Garner, J. (1967). Botnvarpan og bunadur hennar. Fiskifelag Islands.
  7. Haraldsson, H. O., Brynjolfsson, S., and Jnsson, V. K. (1996). Reiknileg hermun iustreymis umhverfis toghlera. Vlabrg, 17.rg.:31-35.
  8. Kolda, T., Lewis, R., and Torczon, V. (2003). Optimization by direct search: New perspectives on some classical and modern methods. SIAM review, pages 385-482.
  9. Koziel, S. and Leifsson, L. (2012). Knowlegde-based airfoil shape optimization using space mapping. In 22nd AIAA Applied Aerodynamics Conference.
  10. LADSON, C. (1988). Effects of independent variation of mach and reynolds numbers on the low-speed aerodynamic characteristics of the naca 0012 airfoil section.
  11. Tannehill, J., Anderson, D., and Pletcher, R. (1997). Computational fluid mechanics and heat transfer. Taylor & Francis Group.
Download


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