Heat-Sensitive Metallurgy Allows for Retractable, Simple Vortex Generators
Normally vortex generators have always been welded onto whatever aerodynamic surface requires their surface. Yet, these little aero-rakes are normally only required for very specific modes of a given flight, such as low speed. During the rest of the flight regime, the devices simply generate drag. Of course, that drag impacts fuel efficiency. If, however, the vortex generators could be retracted to any degree, that drag could largely be reduced. NASA is showing off a unique and passive system for self-retracting vortex generators at Airventure 2023. The basics of this device are demonstrated in a small model of a wing section in the NASA pavilion.