Vorticity Generation and Transport on a Plunging Wing

Flow structure and vorticity transport on a plunging wing

“…(a) (b) Figure 2.15: a) Horizontal and vertical PIV planes, b) The flow volume reconstructed from horizontal and vertical PIV planes. The orientation of the reconstructed data is such thatthe laser-illuminated region is above the plate, and the plate casts a shadow in the region beneath it.2.2.5 Surface Pressure MeasurementsPhase-averaged pressure measurements were conducted by James Akkala[12] on the surface of the airfoil using flush-mounted pressure taps in order to estimate the vorticity flux from the surface of the wing due to the pressure gradients set up by the leading-edge vortex. Pressure taps of diameter 1.6 mm (1/16") were mounted around the mid-span location of the airfoil, beginning at 3.2 mm from the leading edge with chordwise spacing of 1.6 mm over a chordwise distance of 22.2 mm (7/8"), and with chordwise spacing of 6.4 mmm (1/4") over the remainder of the chord length, as shown in Figure 2.16.…”