Low-Speed Static Stall Suppression Using Steady and Pulsed Air-Jet Vortex Generators

Delay of Dynamic Stall Using Pulsed Air-Jet Vortex Generators

“…The array of 20 AJVGs was along the 12% chord position, thus the length scale for the non-dimensional excitation frequency is x T E = 0.44m. The spanwise spacing of the AJVGs was 45mm, and each AJVG orifice had an exit area of 18mm 2 with the jet pitched at an angle 30 o to the local tangent to the airfoil surface and skewed by 60 o relative to the free-stream direction to match those used by [15]. The internal AJVG actuator air ducting system consisted of the plenum pipe which fed all of the 20 jets and was pressure regulated.…”

The application of passive air jet vortex-generators to stall suppression on wind turbine blades

“…Various flow control methods that aim to re‐energize tired boundary layers and thereby suppress flow separation have been successfully developed. These include techniques such as vane vortex‐generators, steady air jet blowing, pulsed blowing and synthetic jets and acoustic excitation . The technique of intensifying the fluid mixing rates by the artificial formation of boundary layer‐embedded longitudinal vortices has been found to be a particularly powerful method.…”