Combined multi-speed jet engine for the drive of airplanes and space vehicles
AssigneeMTU Motoren-und Turbinen-Union Munchen GmbH
InventorHubert Grieb
Life of this patent
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Abstract
Composite changeover-type reaction power plant for propelling aircraft and spacecraft operating in subsonsic, supersonic and hypersonic regions, embracing a turbofan bypass engine with front fan, and a ramjet engine with a cycle corresponding to that of the fan, where the fan has individually independently supported, operationally counterrotating statorless rotors and variable fan blades which are feathered and immobilized during ramjet operation for low drag during said ramjet operation.
Claims22
Composite changeover-type reaction powerplant for propelling aircraft and spacecraft at both subsonic and super/hypersonic speeds, comprising selectively operable core engine means and ramjet engine means,
- wherein said core engine means includes turbine means and a multistage turbofan compressor driven by the turbine means and serving to supply compressed air to a bypass flow duct surrounding the turbin means and forming a portion of a cool gas cycle,
- wherein said ramjet engine means is coaxially disposed around the core engine means, said bypass flow duct of the core engine means serving as part of a ramjet air inlet means when operating as a ramjet engine with deactivation of the core engine means,
- wherein said multistage turbofan compressor includes a pair of separately supported operationally counterrotating fan blade units without any intervening stator blade units therebetween, and wherein means are provided for feathering and immobilizing the fan blades of the fan blade units during ramjet engine operation of the powerplant.
Dependencies are inferred from the claim text.