Abstract: A method and structure for thermal management for a vehicle is provided. The method includes extracting a flow of compressed fluid from a compressor section of a propulsion system in which the flow of compressed fluid includes a pressure parameter, and generating an output torque via expanding at least a portion of the flow of compressed fluid across a turbine operably connected to a driveshaft. The turbine is positioned downstream of the compressor section and upstream of a cooling system.

Abstract: A fuel oxygen reduction unit is provided that includes an inlet fuel line and an outlet fuel line; an oxygen transfer assembly in fluid communication with the inlet fuel line, the outlet fuel line, and a stripping gas flowpath for reducing an amount of oxygen in an inlet fuel flow through the inlet fuel line using a stripping gas flow through the stripping gas flowpath; a catalyst in communication with the stripping gas flowpath at a location downstream of the oxygen transfer assembly, the catalyst configured to reduce an oxygen content of the stripping gas flow through the stripping gas flowpath; and a recuperative heat exchanger in airflow communication with the stripping gas flowpath at a location downstream of the catalyst and upstream of the catalyst for exchanging heat from the stripping gas flow flowing from the catalyst with the stripping gas flow flowing through the recuperative heat exchanger at the location upstream of the catalyst.

Abstract: A method of managing thermal energy in a propulsion system includes diverting a flow of bleed air from a compressor section of the propulsion system. An amount of the flow of bleed air diverted from the compressor section is at least 5% of an inlet flow at an inlet of a high pressure compressor of the compressor section. The flow of bleed air is provided to a thermal management system. The flow of bleed air is passed through an expansion turbine of the thermal management system. The flow of bleed air is provided to a thermal load.

Abstract: A method and structure for thermal management for a vehicle is provided. The method includes extracting a flow of compressed fluid from a compressor section of a propulsion system in which the flow of compressed fluid includes a pressure parameter, and generating an output torque via expanding at least a portion of the flow of compressed fluid across a turbine operably connected to a driveshaft. The turbine is positioned downstream of the compressor section and upstream of a cooling system.