Thickness effect of NACA foils on hydrodynamic global parameters, boundary layer states and stall establishment

Christophe Sarraf (1, 2) , Henda Djeridi (3, 4) , Sébastien Prothin (2) , Jean-Yves Billard (2)

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

The present study investigates experimentally the hydrodynamic behavior of 2D NACA (15, 25, 35%) symmetric hydrofoils at Reynolds number 0.5 106 . A particular attention is paid on the hysteretic behavior at static stall angle and a detailed cartography of boundary layer structures (integral quantities and velocity profiles) is given in order to put in evidence the mechanism of the detachment and the onset of von Karman instability for thick profile

Mots clés: Boundary layer; Thick foils; Lift and drag; Von Karm an street

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

Christophe Sarraf, Henda Djeridi, Sébastien Prothin, Jean-Yves Billard. Thickness effect of NACA foils on hydrodynamic global parameters, boundary layer states and stall establishment. Journal of Fluids and Structures, 2010, 26 (4), pp.559-578. ⟨10.1016/j.jfluidstructs.2010.02.004⟩. ⟨hal-01208040⟩