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Thrust augmentation apparatus for a propulsive gas jet 11 including: an outer augmentor housing 15 and an inner augmentor housing 21 arranged coaxially with the jet 11. A minor air flow 25 is drawn into the inner passage 24 by an ejector effect, that flow 25 driving turbine vanes 28 projecting inwar

Thrust augmentation apparatus for a propulsive gas jet 11 including: an outer augmentor housing 15 and an inner augmentor housing 21 arranged coaxially with the jet 11. A minor air flow 25 is drawn into the inner passage 24 by an ejector effect, that flow 25 driving turbine vanes 28 projecting inwardly but terminating short of the jet 11. The vanes 28 transmit drive to fan blades 13 in the outer housing 15 to promote a thrust augmenting air flow 14. As an alternative to turbine vanes 28, gas scoops 32 may be used to develop the energy for creating the air flow 14.

대표청구항 ▼

Thrust augmentation apparatus for use with a high temperature, high speed rocket exhaust gas jet from a rocket nozzle including: a mass flow augmentor for creating an increased thrust augmenting air flow in an annular region surrounding the rocket exhaust gas jet; an augmentor drive arrangement incl

Thrust augmentation apparatus for use with a high temperature, high speed rocket exhaust gas jet from a rocket nozzle including: a mass flow augmentor for creating an increased thrust augmenting air flow in an annular region surrounding the rocket exhaust gas jet; an augmentor drive arrangement including an inner augmentor housing having a forwardly directed inlet mouth and a passage therethrough for receiving the rocket exhaust gas jet, the diameter of the passage being greater than the outer diameter of the rocket exhaust gas jet, so that a minor air flow of ambient air is drawn into the passage through the inlet mouth by the rocket exhaust gas jet, the diameter of the passage being greater than the outer diameter of the rocket exhaust gas jet, so that a minor air flow of ambient air is drawn into the passage through the inlet mouth by the rocket exhaust gas jet and mixes with a part of the rocket exhaust gas jet to create mixed minor air flow of lower temperature than the rocket exhaust gas jet which mixed minor air flow passes through the passage, the augmentor drive arrangement further including drive means projecting inwardly into the passage and terminating radially outward of the longitudinal axis of the passage, the drive means being arranged to encounter the mixed minor air flow but not the high temperature rocket exhaust gas jet; the mass flow augmentor including an outer augmentor housing having a passage therethrough, the outer augmentor housing being arranged coaxially with and outwardly of the inner augmentor housing so as to define an annular space between the inner and outer augmentor housings for said thrust augmenting air flow, the mass flow augmentor further including a plurality of fan blades arranged within said annular space and extending in a radial direction relative to the axis of the rocket exhaust gas jet; said drive means being operably coupled to the fan blades of the mass flow augmentor so that the mixed minor air flow reacts with the drive means to provide driving energy for the drive means which in turn drives the fan blades of the mass flow augmentor to cause them to rotate and thereby create said thrust augmenting air flow in said annular region.