An apparatus comprising is provided including an auxiliary power unit positioned within an aircraft. A reverse thrust assembly is driven by the auxiliary power unit to provide reverse thrust during landing of the aircraft. An air flow surface having a first boundary layer of moving fluid when external air is flowed along the airflow surface which could be a nacelle, pylon or any other aircraft surface. A movable member is configured to move between a first position to direct the boundary layer to the auxiliary power unit during climb and cruise of the aircraft, and to a second position to direct a freestream air feed to the auxiliary power unit during landing of the aircraft. Further, the movable member may switch to a third conduit to extract the boundary layer from the interior surface of an engine air intake to reduce the main engine inlet losses and distortion.
AIRCRAFT BOUNDARY LAYER REMOVAL WITH AUXILLIARY POWER UNIT SUCTION
DISPOSITIF DE RETRAIT DE LA COUCHE LIMITE D'UN AERONEF PAR SUCCION D'UN VERIN DE COMMANDE AUXILIAIRE
2016-06-15
Patent
Electronic Resource
English
AIRCRAFT BOUNDARY LAYER REMOVAL WITH AUXILLIARY POWER UNIT SUCTION
European Patent Office | 2018
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