boundary-layer control

boundary-layer control

[′bau̇n·drē ‚lā·ər kən′trōl]

(fluid mechanics)

Control over the development of a boundary layer by reduction of surface roughness and choice of surface contours. Abbreviated BLC.

boundary-layer control

Flow pattern without boundary layer control.

Flow pattern after high-velocity air is blow over the airfoil.

Aircraft with boundary layer control by blowing.

Methods used to control the boundary layer by sucking air through slots, making a series of small holes or porous surfaces, by blowing, or by using discrete jets. These methods can be employed to decrease drag or to increase lift on the whole or part of the surface.