초록 ▼

A system for eliminating turbulence in aerodynamic surfaces, such as engine nacelles, resulting from air passing over joints and gaps in the aerodynamic surface. Basically, this system includes a suction chamber within the nacelle and extending along the inner skin wall adjacent to gaps or joints, s

A system for eliminating turbulence in aerodynamic surfaces, such as engine nacelles, resulting from air passing over joints and gaps in the aerodynamic surface. Basically, this system includes a suction chamber within the nacelle and extending along the inner skin wall adjacent to gaps or joints, such as around access doors, at the interface between the nose cowl and the fan cowl door, etc. Typically, a series of apertures extend through a top portion of the suction chamber below the gap to permit air to pass from the gap to the suction chamber. At least one duct communicates with the chamber and extends to a suction pump. In operation, the pump sucks air through the duct, suction chamber, apertures and gap, to prevent the formation of a transition from low drag laminar flow to high drag turbulent flow at the gap.

대표청구항 ▼

A system for maintaining laminar flow over gaps in an aerodynamic aircraft engine nacelle surface which comprises: a nacelle skin surface having at least one elongated gap in said surface skin between the ends of a first skin portion and a second skin portion; elongated unitary plenum chamber means

A system for maintaining laminar flow over gaps in an aerodynamic aircraft engine nacelle surface which comprises: a nacelle skin surface having at least one elongated gap in said surface skin between the ends of a first skin portion and a second skin portion; elongated unitary plenum chamber means having a top portion which abuts the inner margins of said first and second skin portions to close the bottom of said gap within said skin; a plurality of spaced apertures provided in said top portion of said plenum chamber means and arranged longitudinally along such gap and providing fluid flow communication between said gap and said plenum chamber means; outlet duct means having a first end communicating with said chamber means and a second end adapted to be connected to a suction pump means, whereby air can be drawn through said duct means, plenum chamber, apertures, and gap so that laminar air flow over said gap is prevented from transitioning to turbulent flow.