초록 ▼

A fluid mixing apparatus for mixing primary exhaust and secondary airflow in a turbofan engine with provision for changing the ratio of secondary airflow to primary exhaust cross-sectional areas in the mixing plane. The mixing apparatus includes a segmented annulus (50) attached to the aft end of an

A fluid mixing apparatus for mixing primary exhaust and secondary airflow in a turbofan engine with provision for changing the ratio of secondary airflow to primary exhaust cross-sectional areas in the mixing plane. The mixing apparatus includes a segmented annulus (50) attached to the aft end of an engine generator casing (24), the annulus having a plurality of segments of which at least a portion are movable segments (52) hingedly connected to the generator. Each movable segment has an inboard position (54) in which the cross-sectional area ratio is increased and an outboard position (56) in which the ratio is decreased. A number of mixing devices (62) are connected to the segments. A repositioning assembly (96) moves the movable segments between their inboard and outboard positions. A first preferred embodiment of the mixing apparatus includes a number of stationary segments (60) interspersed between the movable segments (52). The mixing devices (62) are attached to the stationary segments (60). A second preferred embodiment of the mixing apparatus includes only movable segments (52), with the mixing devices (62) being attached to the movable segments. Expansion mechanisms (96) are provided between adjacent movable segments, as needed.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A mixing apparatus for mixing primary exhaust of a engine generator with secondary airflow at a mixing plane in an aircraft turbofan engine, the mixing plane including a cross-sect

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A mixing apparatus for mixing primary exhaust of a engine generator with secondary airflow at a mixing plane in an aircraft turbofan engine, the mixing plane including a cross-sectional primary exhaust area and a cross-sectional secondary airflow area, the mixing apparatus comprising:(a) a plurality of segments connected to the gas generator of which at least a portion of the plurality of segments are movable segments, each movable segment having an inboard position for increasing the ratio of secondary airflow area to primary exhaust area, each movable segment having an outboard position for decreasing the ratio of secondary airflow area to primary exhaust area;each movable segment comprising interconnected interior and exterior walls, each movable segment being rotatable connected to the gas generator;(b) a number of mixing devices connected to the plurality of segments for mixing the primary exhaust and the secondary airflow; and(c) a repositioning assembly for moving the movable segments between their inboard and outboard positions.