Airfoil separation control using multiple-orifice air-jet vortex generators

A study was conducted to demonstrate airfoil separation control using multiple-orifice air-jet vortex generators. The study featured a nozzle width and injection velocity profile that increased three times by a factor of e. An injection width and injection velocity profile that increased once by a factor of e was selected for the investigation. The selected combination of physical nozzle parameters and discretization scheme resulted in each individual orifice having a rectangular shape, with the longer dimension orientated perpendicularly to the crossflow. The nozzle had a greater potential to maximize the use of the energy being fed to it, while the skew and pitch angle of the nozzle was set at 60 and 30 degrees, as this combination of angles produced good results in prior studies under conditions of cyclical and noncyclical changes in angle of attack.