Abstract: A heat exchange module for use with a plurality of similar modules to form a recuperator for use in an gas turbine engine. The module has a center section with a generally rectangular cross-sectional shape, a first side section with a generally triangular cross-sectional shape, and a second side section. The module can be combined with other modules to form a polygonal recuperator with a center aperture.

Abstract: An outlet section for a turbofan gas turbine engine (10) includes an internal flow separator (24), and a small convoluted mixer (28) for initiating mixing between the coaxial fan air stream (22) and hot core engine exhaust gas (26). Mixing is enhanced by an increasing-decreasing diameter nozzle plug (38), having a maximum diameter (40) proximate the annular outlet opening (16). The downstream edge (42) of the outer engine fairing (14) is turned radially inward for enhancing forward thrust in cooperation with the decreasing diameter surface (18) of the plug (38).

Abstract: A method for producing power from coal in a combined cycle apparatus 10 is disclosed. A partial gasifier 22 is used to convert the coal into combustible fluids and combustible char. An auxiliary combustor 20 is employed to burn the char and provide heat to the steam turbine engine cycle. The combustible fluids are burned directly in the gas turbine engine cycle. The efficiency of the cycle is improved by adding coal to the gasifier to improve the efficiency of the gasifier and the steam turbine engine cycle.

Abstract: A combined powerplant 10 employing a gas turbine engine cycle 12 and a steam turbine engine cycle 14 is disclosed. The powerplant includes a partial gasifier 22 and an auxiliary combustor 20. The powerplant utilizes the heating value of coal in a two-stage combustion process by burning the gases derived from the coal within the gas turbine engine and by burning the char derived from the coal externally of the engine in the auxiliary combustor. Heat is transferred from the auxiliary combustor to the respective working mediums of both engines.

Abstract: A power unit consisting of contrarotating axial flow compressor and turbine rotors in a closed cycle helium turbine engine with a centrally located scroll between the compressor and turbine sections (to duct the working medium into and out of the heat source) forms a compact, rugged engine providing lower weight and smaller envelope size for a given power.

Abstract: An increase in the temperature of the gaseous working medium in a gas turbine engine fueled with coal-fired gasifier having a rotating fluidized bed, where the coal is fed radially inwardly through the bed toward the axis of rotation is obtained by including a secondary combustor. The gasifier is fed with compressor discharge air and is operated fuel rich by limiting the amount of compressor discharge air fed to the fluidized bed. The excess compressor discharge air mixes with the exhaust from the gasifier for further combustion resulting in an increase in the temperature of the gaseous working medium that is ultimately utilized for driving the turbine of the engine.

Abstract: A coal fired combustor for a gas turbine engine comprises a centrifugal fluidized bed where the coal particulate is introduced radially inwardly toward the axis of rotation through the bed. A centrally mounted pipe which may be rotatable at a different velocity collects and distributes the gases generated by the combustion process and also serves to filter out the elutriated particles. Additives to the fuel for minimizing sulfur dioxide (SO.sub.x) and nitrogen oxide (NO.sub.x) may be added to the fuel prior to introduction to the bed so that the adverse effects of elutriation does not occur before sulfur adsorption.

Abstract: This invention relates to a coal-fired combustor having a centrifugal fluidized bed supported by a louvered constructed rotating drum. Fuel and air are admitted radially internally of the drum to form a fluidized bed from a fuel manifold mounted on the outside of the rotating drum. A steam cleansing system is also disclosed.

Abstract: In a generator containment system, a stator member is enclosed within and turnable in a surrounding outer member, with an energy absorbing structure interconnecting the members so that, in the event of a burst or seized rotor, journaled within said members, the torque imparted to the surrounding rotor will be absorbed during a short turning motion of the stator member, thereby avoiding otherwise catastrophic failure.