Abstract: An aircraft fuel tank system includes at least one fuel tank having a plurality of interconnected bays and a vent arranged so as to allow an inward venting of atmospheric air. The system is arranged so as to direct the inwardly vented air along a vent duct. The vent duct is arranged so as to convey the inwardly vented air to substantially each one of the interconnected bays.

Abstract: A fluid system includes an inlet conduit disposed in a fluid flow path between a fluid source and a fluid destination. The fluid conduit includes a fluid mixing portion. The fluid system includes a fluid separation module disposed in the flow path downstream of the constriction between the source and the destination. The fluid separation module includes a first fluid separator. The fluid system includes a second fluid separator disposed in the flow path upstream of the first fluid separator. The fluid system includes a feedback conduit that may provide fluid communication between an outlet of the fluid separation module and the fluid mixing portion.

Abstract: An air separation module (ASM) is described herein that can include an outer shell having a first end, a second end, and a tubular outer wall disposed between the first end and the second end. The ASM can further include a hollow fiber membrane. The hollow fiber member can include a first tubesheet and a second tubesheet. A plurality of hollow fibers can extend between the first tubesheet and the second tubesheet. At least one of the first tubesheet and the second tubesheet can include a hygrophobic material.

Abstract: A fluid system includes an inlet conduit disposed in a fluid flow path between a fluid source and a fluid destination. The fluid conduit includes a fluid mixing portion. The fluid system includes a fluid separation module disposed in the flow path downstream of the constriction between the source and the destination. The fluid separation module includes a first fluid separator, The fluid system includes a second fluid separator disposed in the flow path upstream of the first fluid separator, The fluid system includes a feedback conduit that may provide fluid communication between an outlet of the fluid separation module and the fluid mixing portion.

Abstract: An aircraft fuel tank system includes at least one fuel tank having a plurality of interconnected bays and a vent arranged so as to allow an inward venting of atmospheric air. The system is arranged so as to direct the inwardly vented air along a vent duct. The vent duct is arranged so as to convey the inwardly vented air to substantially each one of the interconnected bays.

Abstract: An inerting system for an aircraft fuel tank (10) uses an air separation device (12) to produce a supply of nitrogen-enriched air to replenish the fuel tank on consumption of fuel and to maintain the pressure difference across the walls of the tank (10) below design limits. The air separation device (12) provides substantially the whole of the mass of the gas required and so there is substantially no inward venting. This provides a substantially homogenous nitrogen content in the air in the tank (10).

Abstract: An inerting system for an aircraft fuel tank (10) uses an air separation device (12) to produce a supply of nitrogen-enriched air to replenish the fuel tank on consumption of fuel and to maintain the pressure difference across the walls of the tank (10) below design limits. The air separation device (12) provides substantially the whole of the mass of the gas required and so there is substantially no inward venting. This provides a substantially homogenous nitrogen content in the air in the tank (10).