Assertion: airfoil's camber | /r/CapableOf | modify overall flow field
Facets:
value: to reduce the lift
type: PURPOSE
value: to reduce the circulation
type: PURPOSE
Source sentences:
text: The thickened boundary layer's displacement thickness changes the airfoil's effective shape, in particular it reduces its effective camber, which modifies the overall flow field so as to reduce the circulation and the lift.