Abstract: A heat exchanger includes a plurality of tubes conveying a first fluid flow therethrough disposed substantially transverse to a direction of a second fluid flow through the heat exchanger and arranged in a plurality of tube rows extending substantially along the direction of the second fluid flow. The heat exchanger further includes a web sheet having a plurality of webs and a plurality of tube recesses disposed between the webs of the plurality of webs. Each tube of the plurality of tubes is secured to a tube recess of the plurality of tube recesses. Forming a heat exchanger includes forming a web sheet having a plurality of webs and a plurality of tube recesses located between the webs. A plurality of tubes are formed and configured to convey a first fluid flow therethrough. The plurality of tubes are inserted into the plurality of tube recesses.

Abstract: A ceramic matrix composite (CMC) component includes a hardenable material that can be machined to provide a desired dimension and surface finish.

Abstract: A heat exchanger includes a plurality of flat, multi-channel heat exchange tubes extending between spaced headers. Each heat exchange tube has a plurality of flow channels extending longitudinally in parallel relationship from its inlet end to its outlet end. A plurality of connectors are positioned between the inlet header and the heat transfer tubes such that the connector inlet ends are in fluid flow communication with the header through a relatively small cross-sectional flow area openings and the connector outlet ends are adapted to receive the inlet end of a heat exchanger tube. The connector defines a fluid flow pathway from the relatively small cross-sectional flow area opening in the inlet end of the connector to an outlet opening in the outlet end of the connector that opens to the flow channels of the heat exchange tube received in the outlet end of the connector.

Abstract: A fuel deoxygenator includes a plurality of fuel plates defining fuel passages through a housing. A permeable membrane supported by a porous substrate is in contact with fuel flowing through the fuel passages. A vacuum in communication with the porous substrate creates a differential pressure between oxygen within the fuel and the porous membrane. The oxygen partial pressure differential causes oxygen dissolved within the fuel to migrate from the fuel through the permeable membrane away from the fuel. Fuel exiting the outlet includes a substantially reduced amount of dissolved oxygen.