Trailing-edge dynamics of a morphing NACA0012 aileron at high Reynolds number by high-speed PIV

Johannes Scheller (1, 2) , Maxime Chinaud (1) , Jean-François Rouchon (3) , Eric Duhayon (1) , Sébastien Cazin (2) , Moise Marchal (2) , Marianna Braza (2)

1 LAPLACE - LAboratoire PLasma et Conversion d'Energie
2 IMFT - Institut de mécanique des fluides de Toulouse
3 LAPLACE-GREM3 - Groupe de Recherches en Electrodynamique

Particle image velocimetry (piv) measurements are made at the trailing edge of a piezoelectric actuated aileron in order to investigate the physical effect on the flow via high-frequency low-amplitude actuation at high Reynolds numbers. The measurements at different actuation frequencies show the modification of the primary frequency components of the flow with the actuation frequency. A statistical analysis reveals the reduction of the Reynolds stress components which increases with the actuation frequency. Proper orthogonal decomposition (pod) analysis shows the modification of the spatial modes illustrating the vortex breakdown in the shear-layer and the reduction of the temporal mode spectral energy depending on the actuation. It has been shown that a specific low amplitude actuation frequency produces a significant reduction of the predominant shear-layer frequency.

Mots clés: Morphing; Piezoelectricity; Turbulence; Shear layer; Kelvin–Helmholtz vortices; High-speed PIV

Domaines: Mécanique des fluides [physics.class-ph]; Energie électrique; Plasmas

Johannes Scheller, Maxime Chinaud, Jean-François Rouchon, Eric Duhayon, Sébastien Cazin, et al.. Trailing-edge dynamics of a morphing NACA0012 aileron at high Reynolds number by high-speed PIV. Journal of Fluids and Structures, 2015, vol. 55, pp. 42-51. ⟨10.1016/j.jfluidstructs.2014.12.012⟩. ⟨hal-03518803⟩