Unsteady surface pressure measurements on a pitching rectangular wing

Unsteady vortex dynamics and surface pressure topologies on a finite pitching wing

“…Outboard, near the wingtip, vortex convection was retarded by pinning at the tip region as visualized by Freymuth,4 and quantitatively corroborated by Robinson and coworkers. 8 Inboard, vortex convection was accelerated by mutual induction acting between the inboard leg of the vortex arch and the vortex image presented by the splitter plate.…”

HAWT dynamic stall response asymmetries under yawed flow conditions

“…Using surface pressure measurements, Robinson, et al [10] documented the lift enhancement and prolongation due to vortex pinning and straining near the tip of a rapidly pitching wing. Also using surface pressure measurements, Lorber, Carta, and Covino [11] characterized dynamic stall at elevated Reynolds numbers over a broad parameter range, using a wing oscillating in pitch.…”

“…[10,13] Finally, between locations A and C, the vortex forms an arch over the central portion of the wing, with the apex located near B. Vortex convection velocity was substantially faster at B than it was at A or C, due to increased exposure to the freestream flow. Notably, the shape and location of the vortex between A and C recapitulates the vortex topology presented in Figure 13.…”

HAWT dynamic stall response asymmetries under yawed flow conditions

“…Here vorticity deformation significantly augments vortex-surface interaction and amplifies local suction magnitudes. 10,13 Finally, between locations A and C the vortex forms an arch over the central portion of the wing, with the apex located near B.…”