Thickness and cavitation effects on vibrations of hydrofoils at large angle of attack

Christophe Sarraf (1) , Henda Djeridi (2) , Jean-Yves Billard (3)

1 LEMFI - Laboratoire d'énergétique et de mécanique des fluides interne
2 LEGI - Laboratoire des Écoulements Géophysiques et Industriels [Grenoble]
3 IRENAV - Institut de Recherche de l'Ecole Navale

One of the main interest of thick hydrofoils is the stall delay that such profiles can provide when used at high incidences. In naval applications such profiles are use for the design of rudders or POD struts. In spite of their increasing use their behavior is not clearly understood and very few data are available concerning their hydrodynamic behavior at low and high incidences (turbulent boundary layer structures, performance control, unsteady separated flows, cavitating behavior or bucket and induced vibrations). In order to get some insight, an experimental study on the hydrodynamic and cavitating behaviour of 2D Naca (15, 25, 35%) symmetric hydrofoils at moderate chord Reynolds numbers (≈ 0.5 × 106) is performed.

Domaines: Mécanique des fluides [physics.class-ph]

Christophe Sarraf, Henda Djeridi, Jean-Yves Billard. Thickness and cavitation effects on vibrations of hydrofoils at large angle of attack. IUTAM Symposium on Fluid-Structure Interaction in Ocean Engineering, Jul 2007, Hambourg, Germany. pp.229-240, ⟨10.1007/978-1-4020-8630-4_20⟩. ⟨hal-01924899⟩