Aero blows

摘要

Imagine improving aerodynamic drag and lift without wings, spoilers, underbody Venturis, or motorized surfaces, but with little puffs of lightly pressurized air. It's an idea that's gaining momentum as demand builds for increased fuel economy.rnThe basic principle behind it is named for Romanian Henri Coanda, who employed it in the world's first jet-propelled airplane in 1910 (which crashed). The Coanda effect is the tendency of a fluid jet (like air) to stay attached to an adjacent curved surface, which causes natural airflow above it to also attach, reducing turbulence and providing the lift effect of a wing shape without the wing shape.