A heating system is configured to produce heated fluid. The system includes a source of primary fluid, a diffusing structure comprising an outlet structure out of which the heated fluid flows, at least one conduit coupled to the source and the diffusing structure and configured to introduce to the diffusing structure the primary fluid, and an intake structure coupled to the diffusing structure and configured to introduce to the diffusing structure a secondary fluid accessible to the system. The heated fluid includes the primary and secondary fluids.

A method of heating a fan blade of a gas turbine engine for anti-icing includes emitting jets of heated air from a radial fin disposed upstream from a radially inward portion of a fan blade airfoil, the jets of heated air being directed by outlet orifices in a downstream direction substantially parallel to a flow of incoming air over the fan blade airfoil.

An active tip clearance control system of a gas turbine engine and an associated method are disclosed. The system comprises a Coanda effect fluidic device configured to control a flow of clearance control fluid to a turbine section of the gas turbine engine for active tip clearance control.

A casing treatment comprising a hub having a surface, the hub being rotatable about an axis within a casing of a gas turbine engine compressor, at least one spiral groove formed in the surface extending axially relative to the axis, a stator blade fixed to the casing, wherein a tip of the stator blade is proximate to the at least one spiral groove.

A propulsion system coupled to a vehicle. The system includes a diffusing structure and a conduit portion configured to introduce to the diffusing structure through a passage a primary fluid produced by the vehicle. The passage is defined by a wall, and the diffusing structure comprises a terminal end configured to provide egress from the system for the introduced primary fluid. A constricting element is disposed adjacent the wall. An actuating apparatus is coupled to the constricting element and is configured to urge the constricting element toward the wall, thereby reducing the cross-sectional area of the passage.

A gas turbine engine system is disclosed herein. The gas turbine engine system includes an engine core configured to discharge air through an exhaust nozzle along a central axis and a thrust director arranged near the exhaust nozzle and configured to redirect the discharge air by applying flow to the discharge air near the exhaust nozzle.

This invention relates to a ceiling mounted air circulating apparatus comprising, in combination: a motor; an essentially centrally located radial or axial air impeller; air guiding means; optional airflow enhancement by means of air amplification means; optional centrally located wiring path from an electrical power source to a wiring enclosure suitable for hanging a lighting fixture or chandelier; and decorative embellishments, ail of which are arranged to blend with the architectural style of a space in a manner similar to a decorative ceiling medallion, the plariform of which, when viewed from below may be circular, rectangular, or polygonal. Optionally, the apparatus of the present invention may embody any of the following; heating, cooling, filtration means, positive ion generation means, and / or air sterilization means.

This invention relates to a ceiling mounted air circulating apparatus comprising, in combination: a motor; an essentially centrally located radial or axial air impeller; air guiding means; optional airflow enhancement by means of air amplification means; optional centrally located wiring path from an electrical power source to a wiring enclosure suitable for hanging a lighting fixture or chandelier; and decorative embellishments, ail of which are arranged to blend with the architectural style of a space in a manner similar to a decorative ceiling medallion, the plariform of which, when viewed from below may be circular, rectangular, or polygonal. Optionally, the apparatus of the present invention may embody any of the following; heating, cooling, filtration means, positive ion generation means, and / or air sterilization means.

A propulsion system coupled to a vehicle. The system includes a diffusing structure and a conduit portion configured to introduce to the diffusing structure through a passage a primary fluid produced by the vehicle. The passage is defined by a wall, and the diffusing structure comprises a terminal end configured to provide egress from the system for the introduced primary fluid. A constricting element is disposed adjacent the wall. An actuating apparatus is coupled to the constricting element and is configured to urge the constricting element toward the wall, thereby reducing the cross-sectional area of the passage.

A cooling system for an aircraft, including a heat exchanger for cooling a hot fluid with cooling air, an air intake for the supply of cooling air and a Coand?-effect air amplifier for the creation of a flow of cooling air.