초록 ▼

An air modulation apparatus, such as for use in modulating cooling air to the turbine section of a gas turbine engine. The apparatus includes valve means disposed around an annular conduit, such as a nozzle, in the engine cooling air circuit. The valve means, when in a closed position, blocks a port

An air modulation apparatus, such as for use in modulating cooling air to the turbine section of a gas turbine engine. The apparatus includes valve means disposed around an annular conduit, such as a nozzle, in the engine cooling air circuit. The valve means, when in a closed position, blocks a portion of the conduit, and thus reduces the amount and increases the velocity of cooling air flowing through the nozzle. The apparatus also includes actuation means, which can operate in response to predetermined engine conditions, for enabling opening and closing of the valve means.

대표청구항 ▼

In a gas turbine engine having a cooling air circuit therein for directing cooling air to an engine rotor component, an air modulation apparatus comprising: (a) an annular nozzle including a plurality of circumferentially spaced vanes and a plurality of flow passages, each of said flow passages bein

In a gas turbine engine having a cooling air circuit therein for directing cooling air to an engine rotor component, an air modulation apparatus comprising: (a) an annular nozzle including a plurality of circumferentially spaced vanes and a plurality of flow passages, each of said flow passages being disposed between and defined by adjacent ones of said vanes and each flow passage having an inlet and an outlet, each said inlet being effective for receiving a portion of said cooling air; (b) valve means effective for covering only a portion of said nozzle to prevent flow to a first portion of said plurality of flow passages and thereby reducing the amount and increasing the velocity of cooling air exiting freely from a remaining portion of said plurality of flow passages of said nozzle not provided with valve means; and (c) actuation means for opening and closing said valve means.