3D flow and deformation measurements of rigid and flexible wings under combined pitching and plunging motions using Lagrangian particle tracking

Kurzfassung

A dynamic test rig based on a hypocycloid gear has been designed for at DLR for underwater flapping wing applications. Three NACA0012 wings with different flexibility, to be attached to the end plate, have been constructed (half span: 150 mm, chord: 50 mm ). The wings perform a two-dimensional motion, i.e. within the x,z-plane, whereas the pitch axis is constant pointing in the y-direction. Markers with approx. 0.5mm diameter were printed onto the wings with pseudo-random distribution to allow detection of the wing motion and deformation. Lagrangian particle tracking of the markers, together with particles in the flow was performed