Abstract: A machine is provided having an engine system wherein at least one engine system component with an acoustic reflective surface is surrounded by a jacket configured to absorb sound from at least one sound producing device of the engine system. The jacket includes a sound absorbing material such as fibrous thermal insulation and an acoustic permeable covering between the acoustic reflective surface and the engine compartment of the machine. The acoustic permeable covering of the jacket may comprise a micro-perforated skin, whereby acoustic energy from the at least one sound producing device of the engine system can enter a volume defined by the jacket wherein it is absorbed by the sound absorbing material. A method of operating an engine system includes dissipating engine sound within a jacket surrounding an engine system component, the jacket including an acoustic permeable covering and a sound absorbing material positioned within the covering.

Abstract: A machine is provided having an engine system wherein at least one engine system component with an acoustic reflective surface is surrounded by a jacket configured to absorb sound from at least one sound producing device of the engine system. The jacket includes a sound absorbing material such as fibrous thermal insulation and an acoustic permeable covering between the acoustic reflective surface and the engine compartment of the machine. The acoustic permeable covering of the jacket may comprise a micro-perforated skin, whereby acoustic energy from the at least one sound producing device of the engine system can enter a volume defined by the jacket wherein it is absorbed by the sound absorbing material. A method of operating an engine system includes dissipating engine sound within a jacket surrounding an engine system component, the jacket including an acoustic permeable covering and a sound absorbing material positioned within the covering.

Abstract: A method of manufacturing a metallic foam based heat exchanger includes positioning an aluminum foam block, for example, within a housing defining a first fluid passage, and placing the block in contact with a second portion of the housing defining at least one other fluid passage, the second housing portion being an extrusion. A brazing flux material and a brazing filler are applied to at least one of the foam and the extrusion, the foam being thermally coupled to the extrusion with the brazing filler via heating in a brazing furnace. A heat exchanger includes a housing having a fluid passage with a metallic foam such as an aluminum foam therein. The metallic foam is attached to a metallic extrusion such as an aluminum extrusion, and connected therewith via a thermally conducting brazing filler.

Abstract: A fan assembly includes a fan including a plurality of fan blades, and each of the fan blades includes a tip. The fan assembly also includes a fan shroud surrounding the fan blades. The fan shroud includes a recess, and the recess includes an inner surface and at least two side surfaces. The fan assembly also includes at least one flexible member provided on at least one of the surfaces of the recess or the tips of the fan blades. At least one of a portion of the at least one flexible member or the tips of the fan blades is received in the recess.

Abstract: A power system includes a rotary compressor. The power system may also include one or more power sources drivingly connected to the rotary compressor, the one or more power sources not including a turbine. Additionally, the power system may include a turbine, the turbine being free to rotate independently of the rotary compressor. The power system may also include power-system controls operable to cause the rotary compressor to generate a gas flow by causing the one or more power sources to rotate the rotary compressor. Additionally, the power system may be operable to direct at least a portion of the gas flow generated by the rotary compressor through the turbine to rotate the turbine.

Abstract: An engine system includes an engine such as a compression ignition internal combustion engine, including a heat exchanger in an exhaust system thereof. The heat exchanger including at least one carbon foam block for cooling exhaust gas with cooling air. An exhaust system segment includes a carbon foam based heat exchanger configured to exchange heat between exhaust gas and cooling air at least in part via the carbon foam.

Abstract: A turbine system is provided including a plurality of gas turbine engines, each having a compressor section for producing compressed air, a combustor section, and a turbine section yielding hot exhaust gas. A single, common recuperator section is shared by and operatively associated with the plurality of gas turbine engines. A first flow path within the single, common recuperator section is configured to receive compressed air produced by the compressor section of each gas turbine engine. A second flow path, separated from the first flow path and within the single, common recuperator section is configured to receive hot exhaust gases yielded by the turbine section of each gas turbine engine.

Abstract: A filter cleaning system is provided for a gas turbine engine including a compressor section and a combustor section. A mechanism is operatively connected to the gas turbine engine and is configured to be driven by the gas turbine engine in a first mode and configured to drive the gas turbine engine in a second mode. A first flow path is for delivering compressed air to the compressor section. At least one air filter is configured to filter air entering the first flow path. A second flow path is for delivering compressed air from the compressor section to the combustor section in the first mode. A third flow path is for delivering compressed air from the compressor section to the at least one air filter during the second mode.

Abstract: A thermoelectric heat exchange module includes a first substrate including a heat receptive side and a heat donative side and a series of undulatory pleats. The module may also include a thermoelectric material layer having a ZT value of 1.0 or more disposed on at least one of the heat receptive side and the heat donative side, and an electrical contact may be in electrical communication with the thermoelectric material layer.

Abstract: A vehicle 10 has a frame 12 on which is positioned an engine 17. An engine enclosure 16 is at least partially positioned about the engine 17. A cooling system enclosure 18 is at least partially positioned about the engine 17 and about a conventional cooling media, such as a radiator 52. The radiator has a fluid 50 flowing there through to cooling the engine 17. A mass of ambient air 60 is used to cool the fluid 50. A partition 30 prevents the mass of ambient air 60 used to cool the fluid 50 from entering the engine enclosure 16.