Air ejection device comprising an aerodynamic profile provided with a slot obturating flexible tongue

摘要

An air ejection device comprising a profile provided with a slot 36 and which comprises an ejection nozzle 42. The device comprises a flexible tongue 48 fixed in the continuity of the profile, in such a way as to obstruct the slot where the tongue is able to lift under the effect of a pressure differential between the air situated in the ejection nozzle and the outside air. The tongue makes it possible for the slot made in the profile to be obstructed during phases of flight during which the ejection of the air is unnecessary, and to prevent external air from entering said slot. The flow of air over the aerodynamic profile is unaffected and there is no increase in drag. Because the tongue lifts as a result of a pressure differential, it does not require any control mechanism for lifting it.