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Low Speed Static Stall Suppression Using Steady and Pulsed Air Jet Vortex Generator Flow Control

One of the most detailed experiments on pulsed jet flow control for turbulent stall suppression on aerofoil sections is presented. The results confirmed that pulsed air-jets, pulsing at frequencies above the natural trailing edge shedding frequency of the aerofoil, enhances the stall suppression performance of steady air jets, but require less than half of the mass flow rate of blown air. The data provides improved physical insight into the physics of the effect of jet pulsing on the separation front. This work helps increase TRL of pulsed jet flow control, bringing the technology closer to full flight demonstration.