Aerodynamic load control on a dynamically pitching wind turbine airfoil using leading-edge protuberance method

Preface: Wind turbines: aeromechanics and farm optimization

“…A regression krigingbased metamodeling technique is employed to optimize the operation parameters of the DBD plasma system to suppress the massive flow separation/airfoil stall over the surface of a DU-96-W-180 turbine airfoil model. Zhang et al [2] reported an experimental investigation to apply a leading-edge protuberance technology to control the fluctuations of the unsteady aerodynamic loads acting on a dynamically-pitching wind turbine airfoil. Wang et al [3] presented a numerical study to use a leading-edge undulation control method to suppress the dynamic stall over the surface of a wind turbine airfoil model.…”

“…Three papers contribute to experimental investigations. While Veerakumar et al [1] and Zhang et al [2] presented their experimental studies in wind tunnels to suppress the large-scale flow separation over a wind turbine airfoil model and to control unsteady aerodynamic loads acting on a dynamically pitching turbine blade model, Hong et al…”

Experimental investigation on the effect of Leading Edge Tubercles on the Performance of Marine Propellers in fully wet condition

“…In fact, the vortex pairs acts to weaken the coherency of the structures detached past the foil: on one side, the trough of the tubercle acts to stabilize the separated flow and on the other, the acceleration and compartmentalization of the vortex pair to the flow that delay the separation, act to weaken the turbulent perturbation of the boundary layer and, consequently, tonal and broadband noise (Lau et al, 2012(Lau et al, , 2013Lacagnina et al, 2021). Moreover, these mechanisms act to mitigate the fluctuations of the loads and hysteresis cycle during unsteady motions, in particular during the dynamic stall regime (Hrynuk and Bohl, 2020;Zhang et al, 2020). The LET provided also potential benefits in cavitating flow regime.…”