Effect of Multiscale Endplates on Wing-Tip Vortex

An experimental investigation is conducted to study the effect of multiscale endplates on wing-tip vortex and wing aerodynamic performance at Reynolds numbers 215,000 244,000 based mean chord a NACA 0012 half-span wing. Two groups are tested. The first group has three different fractal patterns applied along top edge endplate, while second two-scale its outboard surface. It experimentally shown that both geometry modifications produce weaker less coherent vortex. Moreover, peak in power spectral density fluctuating axial velocity core Strouhal between 3 10 observed for plain groups, it vanishes endplates. This suggests act structure, making through production smaller eddies as evidenced by spectra. also show potential improvements terms efficiency, with maximum being up 11.1% larger than corresponding endplate.