Abstract: The present disclosure provides air cooling systems and methods for propulsion systems (e.g., aviation or aerospace propulsion systems). More particularly, the present disclosure provides integrated air cooling systems and methods utilizing air cycle machine cooling for hybrid-electric aircraft or aerospace propulsion systems or the like. The present disclosure provides integrated air cycle machine cooling into the hybrid propulsion system (e.g., into the wing-mounted hybrid propulsion system). As such, the air cooling systems and methods of the present disclosure can minimize weight while improving electric motor/generator cooling.

Abstract: An aircraft engine thermal management system includes a body having a coolant passage in thermal communication with an electronic device, wherein the body and the electronic device are located in a first portion of the aircraft. A generator is fluidically connected by a coolant path to the coolant passage wherein the generator is located in a second portion of the aircraft, with at least a portion of the coolant path is located within a cooling location having a lower average temperature than either the first portion or the second portion of the aircraft.

Abstract: An electrical machine assembly includes a stator. The stator includes a core, windings assembled into the core, and a back iron heat exchanger mounted to the core. A first end plate is mounted at a first end of the core and back iron heat exchanger. A second end plate is mounted at a second end of the core and back iron heat exchanger opposite the first end plate. A coolant circuit passes from a coolant inlet in the back iron heat exchanger, through the back iron heat exchanger, into the first end plate, out of the first end plate, through the core, into the second end plate, and out of the second end plate.

Abstract: A hydrogen fueled power system of a vehicle includes a liquid hydrogen fuel source having a volume of liquid hydrogen fuel, and a thermal engine configured to expand the liquid hydrogen fuel into gaseous form via interaction between a heated first portion of the hydrogen fuel and a second portion of the hydrogen fuel. A heat exchanger is located between the liquid hydrogen source and the thermal engine. The heat exchanger is configured to heat the first portion of the hydrogen fuel via thermal energy exchange with a relatively warm fluid. A power generator is positioned fluidly downstream of the thermal engine. The power generator utilizes exhaust from the thermal engine to generate electrical or mechanical power.

Abstract: A power feeder device can include a base having a mounting portion and a plurality of connector structures extending from the mounting portion and spaced apart relative to each other to form a respective gap therebetween. Each connector structure can be configured to receive a respective pair of terminals to electrically connect the respective pair of terminals within connector structures and to block a line of sight between an adjacent pair of terminals. The device can also include a cover configured to mate with the base to enclose each of the plurality of connector structures and to increase a length of a creepage path between each pair of terminals by at least partially inserting into each gap between the connector structures. The base and the cover can be configured to form a terminal opening on each lateral side when assembled to allow pass-through of a conductor and/or portion of each terminal.

Abstract: A compressor system includes a compressor, and an electric motor driving a shaft to drive the compressor. An inlet is connected to a source of air to be compressed. The inlet is connected to the compressor. A fan impeller is mounted in the inlet upstream of the compressor. A cooling air exit communicates with the inlet, and upstream of the compressor. The cooling air exit is connected to the motor to provide cooling air to the motor. A dual compressor system is also disclosed.

Abstract: A hydrogen fueled power system of a vehicle includes a liquid hydrogen fuel source having a volume of liquid hydrogen fuel and a thermal engine configured to expand the liquid hydrogen fuel into gaseous form via interaction between a heated first portion of the hydrogen fuel and a second portion of the hydrogen fuel. A heat exchanger is positioned between the liquid hydrogen source and the thermal engine, and is configured to heat the first portion of the hydrogen fuel via thermal energy exchange with a relatively warm fluid. A turbine is located fluidly downstream of the heat exchanger and upstream of the thermal engine, and is driven by the heated first portion. A power generator is located fluidly downstream of the thermal engine. The power generator utilizes exhaust from the thermal engine to generate electrical or mechanical power. A compressor is operably connected to and driven by the turbine.

Abstract: Methods and systems are provided for automated validation of images generated by uncertified software. One method involves analyzing an unverified image and a reference image in parallel to identify sets of kernels associated with a layer of a convolutional neural network, creating a shared set of kernels associated with that layer in accordance with one or more kernel shortlisting criteria, obtaining a first feature map for the unverified image using that layer of the convolutional neural network and the shared set of kernels, obtaining a second feature map for the reference image using that layer of the convolutional neural network and the shared set of kernels, calculating a similarity score for the unverified image based at least in part on differences between the feature maps and a weighting factor associated with the first layer, and automatically validating the unverified image based at least in part on the similarity score.

Abstract: A power system includes a liquid hydrogen fuel source including a fuel tank containing a volume of hydrogen fuel. The fuel tank includes two or more vacuum insulation layers, and a liquid insulation material positioned between the two or more vacuum insulation layers. A first power generator located fluidly downstream of the hydrogen fuel source. The first power generator utilizes a flow of hydrogen fuel from the volume of hydrogen fuel to generate electrical or mechanical power.

Abstract: An engine system includes an engine duct and a tail cone arranged radially inwardly of the engine duct. The tail cone has an outer surface and an inner surface. A generator housing is arranged in the tail cone. The generator housing includes an outer surface portion spaced from the inner surface of the tail cone. A generator is mounted in the generator housing. An air duct extends from the generator, through the generator housing, through the tail cone, and through the engine duct. The air duct includes an opening exposed to an air stream passing over the engine duct.

Abstract: In accordance with at least one aspect of this disclosure, a power distribution system having integrated cooling includes a chassis defining an interior cavity, an electronics bus structure housed within the interior cavity, and an electrical contactor operatively connected to the electronics bus structure to receive a voltage therefrom. One or more heat dissipation fins can be included extending away from the chassis and configured to dissipate heat from the electronics bus structure to an ambient environment external to the chassis. In embodiments, the electronics bus structure can be sealed within the interior cavity.

Abstract: A cooling system of a power generation system includes a generator cooling circuit having a first cooling fluid circulating therethrough. The generator cooling circuit includes a generator heat exchanger fluidly connected to a generator of the power generation system via the generator cooling circuit to cool the generator. A power converter cooling circuit has a second cooling fluid different from the first cooling fluid circulating therethrough. The power converter cooling circuit includes a power converter heat exchanger fluidly connected to a power converter of the power generation system via the power converter cooling circuit to cool the power converter.

Abstract: A compressor system includes a compressor, and an electric motor driving a shaft to drive the compressor. An inlet is connected to a source of air to be compressed. The inlet is connected to the compressor. A fan impeller is mounted in the inlet upstream of the compressor. A cooling air exit communicates with the inlet, and upstream of the compressor. The cooling air exit is connected to the motor to provide cooling air to the motor. A dual compressor system is also disclosed.

Abstract: Disclosed is a rotor for a generator, having: a rotor body; rotor poles extending radially outward from the rotor body, wherein each rotor pole includes a pole body and opposing pole circumferential side surfaces that are spaced apart from each other in a circumferential direction about the rotor body; coil windings wound about the rotor poles to form a wire bundle against one of the pole circumferential side surfaces; and a wire separator, disposed within the wire bundle, that divides the coil windings within the wire bundle into subsets of wire bundles.

Abstract: Provided are embodiments for a feeder cooling tube, a system and method for performing thermal management. Embodiments include a feeder cooling tube having an inner tube arranged to define a path to flow a fluid through a length of the inner tube, wherein the fluid is provided to remove heat, and an outer tube arranged to enclose the inner tube which defines an area. Embodiments also include one or more feeder cables arranged between the inner tube and the outer tube, and a plurality of cooling struts, wherein each cooling strut of the plurality of cooling struts extends from a surface of the inner tube to a surface of the outer tube.

Abstract: Automated visual docking guidance in and near a bridge area is described herein. One method for aircraft detection, including capturing camera image data of a new aircraft; generating a segmented aircraft mask; segmenting the image data of the new aircraft into body part segmentation data; classifying the body part segmentation data into a plurality of classes; analyzing each class of body part segmentation data to predict an aircraft type for the new aircraft; determining the aircraft type of the new aircraft based on the prediction analysis; and synthetic video generation of new aircraft for generating aircraft specific docking guidance for the new aircraft based on the determined aircraft type.

Abstract: A ram air turbine assembly includes one or more airfoils and a ram turbine operably connected to the one or more airfoils. The ram air turbine includes: a rotor; a stator that includes windings; and a self-regulating heater coupled to the stator. The self-regulating heater configured to vary power that passes through it based on a temperature of the heater.

Abstract: A system for cooling a motor operating within an aircraft system includes an enclosure receiving ram air from a first ram air duct and discharging ram air to a second ram air duct to form a cooling path. The second ram air duct is discrete and independent from the second ram air duct. The system can discharge ram air between a heat exchanger and a fan within the second ram air duct that define a reduced or negative pressure region within the second ram air duct.

Abstract: A thermal management includes an inductor, a housing in thermal communication with the inductor, the housing defining a wall, and a conductor. The conductor has greater thermal conductivity than the wall and is positioned within a groove and/or an aperture formed in the wall. The conductor is configured to conduct heat through the wall more efficiently than if the conductor were not present. A method of manufacturing a thermal management system includes forming a housing by additive manufacturing. The housing defines a wall having at least one of a groove and an aperture defined therein. The method includes positioning a conductor in at least one of the groove and the aperture. The conductor has a greater thermal conductivity than the wall. The method includes positioning an inductor into thermal communication with the housing.

Abstract: A waste heat capture system that can be used with at least a gas turbine engine. The system includes: an air scoop connected to a first component, the air scoop configured to direct air from a first duct to an interior compartment of the first component; a second duct along an exterior of the first component; and a thermoelectric material connected to an interior surface of the first component. The interior compartment of the first component is on a first side of the thermoelectric material and the exterior of the first component is on a second side of the thermoelectric material. The first duct is configured to receive air having a first temperature range, and the second duct is configured to receive air having a second temperature range, wherein the second temperature range is an order of magnitude higher than the first temperature range.