Time-resolved scanning tomography PIV measurements around a flapping wing

• Published in: Experiments in fluids Vol. 52; no. 4; pp. 857 - 864
• Main Authors: David, L., Jardin, T., Braud, P., Farcy, A.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.04.2012; Springer; Springer Verlag (Germany)
• Subjects: Aerodynamics; Applied fluid mechanics; Engineering; Engineering Fluid Dynamics; Engineering Thermodynamics; Exact sciences and technology; Flapping wings; Fluid Dynamics; Fluid flow; Fluid- and Aerodynamics; Fundamental areas of phenomenology (including applications); Heat and Mass Transfer; Instrumentation for fluid dynamics; Mathematical analysis; Physics; Research Article; Scanning; Stabilization; Wakes; Wing tip vortices; Spanwise Vorticity; Trail Edge Vortex; Laser Sheet; Lead Edge Vortex; Vorticity; Wing; Test facilities; Aerodynamics; Experimental study; End vortex; Leading edge; Three dimensional flow; Wing beat; Wakes; Tomography; Particle image velocimetry; Interactions; Velocity measurement; 3D Scanning PIV; Flapping Wings
• ISSN: 0723-4864; 1432-1114
• DOI: 10.1007/s00348-011-1148-5

The three-dimensional flow that develops around a finite flapping wing is investigated using a tomographic scanning PIV technique. The acquisition and correlation processes employed to achieve such measurements have been carefully validated. Issues regarding the relevant timescales of the flow and the spanwise space-resolution are addressed. Results obtained on a hovering flapping wing whose plunging phase is described by a rectilinear motion highlight the influence of the free end condition and the formation of the tip vortex on the leading edge vortices behavior, wing/wake interactions, and wake stabilization.