Open AccessNumerical investigations of the free surface flow around a surface piercing hydrofoil
Author(s) -
Costel Ungureanu
Publication year - 2021
Publication title -
analele universităţii "dunărea de jos" din galaţi. fascicula xi, construcţii navale
Language(s) - English
Resource type - Journals
eISSN - 2668-3156
pISSN - 1221-4620
DOI - 10.35219/annugalshipbuilding/2021.44.13
Subject(s) - marine engineering , towing , free surface , drag , propeller , flow (mathematics) , turbulence , boundary layer , wake , mechanics , aerospace engineering , engineering , geology , physics
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.