Numerical investigations of the free surface flow around a surface piercing hydrofoil

  • Costel Ungureanu Bureau Veritas Romania Bucharest
Keywords: free surface flow, NACA 0012, URANS, VOF, open channel flow.

Abstract

Starting with January 2013, naval architects faces new challenges, as all ships greater than 400 tons must comply with energy efficiency index (MPEC 62, 2011). From ship hydrodynamics point of view one handy solution is using Energy Saving Devices (ESD), with the main purpose to improve the flow parameters entering the propeller. For ballast loading condition the ESD may intersect the free surface disturbing and complicating the flow due to free surface /boundary layer interaction, turbulence and breaking wave effects that coexist and which are not completely clarified so far. Therefore, a free surface flow around a NACA 0012 surface piercing hydrofoil is numerically investigated and the results are compared to experimental results obtained in the Towing Tank of the Naval Architecture Faculty, “Dunarea de Jos” University of Galati. The comparison includes drag and free surface elevation on hydrofoil surface together with numerical uncertainty.

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References

[1]. International Maritime Organization, MEPC 62nd session, 11-15 July, 2011;
[2]. Ungureanu, C., „Experimental Uncertainty for the Galati University Towing Tank Tests with Example for NACA 0012 Surface Piercing Hydrofoil”, Annals of "Dunarea de Jos" University Galati. Fascicle XI, Shipbuilding, pp. 133-140, 2012;
[3]. Ungureanu, C., „Towing Tank Experiments for a Surface Piercing NACA 0012 Hydrofoil”, Annals of "Dunarea de Jos" University Galati. Fascicle XI, Shipbuilding, pp. 5-10, 2011;
[4]. ASME V&V 20, Standard for Verification and Validation in Computational Fluid Dy-namics and Heat Transfer, 2009;
[5]. Roache, P. J, “Quantification of uncertainty in computational fluid dynamics”, Annu. Rev. Fluid. Mech., 29:123–60, 1997;
[6]. Metcalf B., Longo J., Ghosh S., Stern F., “Unsteady free-surface wave-induced boundary-layer separation for a surface-piercing NACA 0024 foil: Towing tank experiments”, Journal of Fluids and Structures 22 (2006) 77–98.
Published
2021-12-03
How to Cite
1.
Ungureanu C. Numerical investigations of the free surface flow around a surface piercing hydrofoil. Annals of ”Dunarea de Jos” University of Galati. Fascicle XI Shipbuilding [Internet]. 3Dec.2021 [cited 29Mar.2024];44:87-4. Available from: https://www.gup.ugal.ro/ugaljournals/index.php/fanship/article/view/4945
Section
Articles