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URANS and DES analysis for a Wigley hull at extreme drift angles

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Abstract

Vortical structures and associated instabilities for flows around the Wigley hull for a wide range of drift angles (10° ≤ α ≤ 60°) with free surface are identified and analyzed. Quantitative verification and validation are conducted on three systematically refined grids with comparison to the experimental data for α = 10°. Analysis of the flow pattern shows a strong correlation between the vortical structures and free-surface wave elevation. For α = 10° and 30°, the flows remain steady and vortices are generated at the keel and fore and aft perpendiculars of the hull. The strength and complexity of these vortices increase with increasing α. At α = 45°, flow becomes unsteady without any significant change in the main flow pattern. At α = 60°, a complex and unsteady flow field on the leeward side of the hull is formed with a large recirculation region from the aft to the fore end, which prevents the flow coming from below the keel from moving up and generating the keel vortices observed at lower drift angles. Karman-like and helical instabilities are analyzed. The effect of Froude number is more apparent for large than for small drift angles.

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Acknowledgments

The Office of Naval Research under Grant N00014-01-1-0073, administered by Dr. Patrick Purtell, sponsored this research. In addition, the “Colegio Oficial de Ingenieros Navales y Oceánicos” of Spain helped the author financially during his studies.

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Authors and Affiliations

  1. IIHR, Hydroscience and Engineering, C. Maxwell Stanley Hydraulics Laboratory, The University of Iowa, Iowa City, IA, 52242-1585, USA

    Antonio Pinto-Heredero, Tao Xing & Frederick Stern

  2. ETSIN, CEHINAV Model Basin, Technical University of Madrid, Avda. Arco de la Victora s/n Ciudad Universitaria, 28040, Madrid, Spain

    Antonio Pinto-Heredero

  3. Mechanical Engineering Department, College of Engineering, Architecture and Physical Sciences, Tuskegee University, Tuskegee, AL, 36088, USA

    Tao Xing

Authors
  1. Antonio Pinto-Heredero
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  2. Tao Xing
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  3. Frederick Stern
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Correspondence to Antonio Pinto-Heredero, Tao Xing or Frederick Stern.

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Pinto-Heredero, A., Xing, T. & Stern, F. URANS and DES analysis for a Wigley hull at extreme drift angles. J Mar Sci Technol 15, 295–315 (2010). https://doi.org/10.1007/s00773-010-0092-z

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  • DOI: https://doi.org/10.1007/s00773-010-0092-z

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