Abstract: Sound-attenuating heat exchangers and methods of utilizing the same are disclosed herein. The sound-attenuating heat exchangers include an aerodynamically shaped layer, a base, an intermediate layer, and a cooled fluid containment body. The aerodynamically shaped layer defines an aerodynamically shaped surface, an opposed intermediate layer-facing surface, and a plurality of apertures. The intermediate layer defines a shaped layer-facing surface and an opposed base-facing surface. The base defines a base surface. The intermediate layer-facing surface at least partially defines a sound-attenuating volume. The base surface at least partially defines an elongate cooling conduit. The sound-attenuating volume is distinct from the elongate cooling conduit and the intermediate layer at least partially fluidly isolates the sound-attenuating volume from the elongate cooling conduit. The cooled fluid containment body at least partially defines a cooled fluid containment conduit.

Abstract: Dendritic heat exchangers and methods of utilizing the same are disclosed herein. The dendritic heat exchangers include an elongate housing extending between a first end and a second end. The elongate housing defines a housing volume, a first fluid inlet, a first fluid outlet, a second fluid inlet, and a second fluid outlet. The dendritic heat exchangers also include a heat exchange structure extending within the housing volume. The heat exchange structure is configured to receive a second fluid inlet stream from the second fluid inlet and to provide a second fluid outlet stream to the second fluid outlet. The heat exchange structure includes a plurality of dendritic tubulars. Each dendritic tubular includes an inlet region, which defines an inlet conduit, and a branching region. The branching region defines a plurality of branch conduits that extends from the inlet conduit. The methods include methods of utilizing the dendritic heat exchangers.

Abstract: Sound-attenuating heat exchangers and methods of utilizing the same are disclosed herein. The sound-attenuating heat exchangers include an aerodynamically shaped layer, a base, an intermediate layer, and a cooled fluid containment body. The aerodynamically shaped layer defines an aerodynamically shaped surface, an opposed intermediate layer-facing surface, and a plurality of apertures. The intermediate layer defines a shaped layer-facing surface and an opposed base-facing surface. The base defines a base surface. The intermediate layer-facing surface at least partially defines a sound-attenuating volume. The base surface at least partially defines an elongate cooling conduit. The sound-attenuating volume is distinct from the elongate cooling conduit and the intermediate layer at least partially fluidly isolates the sound-attenuating volume from the elongate cooling conduit. The cooled fluid containment body at least partially defines a cooled fluid containment conduit.

Abstract: Dendritic heat exchangers and methods of utilizing the same are disclosed herein. The dendritic heat exchangers include an elongate housing extending between a first end and a second end. The elongate housing defines a housing volume, a first fluid inlet, a first fluid outlet, a second fluid inlet, and a second fluid outlet. The dendritic heat exchangers also include a heat exchange structure extending within the housing volume. The heat exchange structure is configured to receive a second fluid inlet stream from the second fluid inlet and to provide a second fluid outlet stream to the second fluid outlet. The heat exchange structure includes a plurality of dendritic tubulars. Each dendritic tubular includes an inlet region, which defines an inlet conduit, and a branching region. The branching region defines a plurality of branch conduits that extends from the inlet conduit. The methods include methods of utilizing the dendritic heat exchangers.

Abstract: A device for measuring the acoustic absorption properties of materials such as liners for jet engines has a first housing, an acoustic driver configured to provide acoustic energy to the first housing, a second housing attached to the first housing, and an acoustic driver configured to provide acoustic energy to the second housing. Acoustic sensors are used to measure the acoustic energy emitted from the two housings and to measure the absorption of each of the housings.