Aeronautics and astronautics – Aircraft power plants
Patent
1985-02-14
1987-05-26
Barefoot, Galen
Aeronautics and astronautics
Aircraft power plants
244 121, 137 151, B64D 3302
Patent
active
046679006
ABSTRACT:
A ram constriction vane diffuser adapted as an air intake of an air plenum-engine pod wherein vertical multiple vanes are fitted on the vertically inclined air intake opening and include fixed vanes positioned adjacent the centerline portion of the air plenums which define an envelope for the airflow including nozzles locate on both sides of a jet engine, a plurality of deflectable vanes positioned in an equally spaced relationship in the air intake openings on both sides of fixed vanes, and wherein each deflectable vane has a leading edge and a drivable trailing section pivotally mounted on the rigid leading section of the deflectable vane and with the drivable trailing sections of each vane and with an actuator for adjusting the angle of the deflectable vanes relative to the freestream air flow for enabling the drivable trailing section of each vane to be turned away from a parallel position to the centerline of an engine suction diffuser, which is the original position thereof for speed flight, to reduce the area of the air intake openings to produce oblique ram-airstream adjacent the engine suction diffuser intake and with each ram-airstream flowing in a tangentially constricted path at critical pressure which forms a convergent-divergent freestream throat and a ram pressure stream in the air plenum on each side of the engine pod resulting in the velocity of the airstream decreasing with an increase in the static pressure thereof and a gain in the air plenums producing a ram constriction pressure airflow to air-inducing nozzles is shown.
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Barefoot Galen
Meaney, Jr. Daniel J.
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