Patent
On-board fuel inerting system
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TLDR
In this article, an inerting system for the fuel tank of an aircraft that includes an oxygen detector to monitor the oxygen partial pressure of the vapors in the ullage (i.e., the overfuel) volume of the tank, a source of an inert gas (e.g., nitrogen) in valved communication with the ULLAGE of the vehicle, and a detector for sensing the oxygen content in the tank and controlling the flow of inert gas to the tillage to maintain that volume with a proportion oxygen that will not support combustion in the event of anAbstract:
An inerting system is disclosed that is adaptable to inert the fuel tank of a vehicle, most typically an aircraft, that includes an oxygen detector to monitor the oxygen partial pressure of the vapors in the ullage (i.e., the overfuel) volume of the tank, a source of an inert gas (e.g., nitrogen) in valved communication with the ullage of the tank, and a detector for sensing the oxygen content in the ullage of the tank and controlling the flow of inert gas to the tillage to maintain that volume with a proportion oxygen that will not support combustion in the event of an ignition source or intrusion of another potentially explosive occurrence within said tank. A specific fiberoptic probe which enables monitoring oxygen content within the tank without introducing a source of electrical current within the tank is also disclosed.read more
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Patent
Oxygen/inert gas generator
TL;DR: In this paper, a gas generation method and apparatus capable of use in an aircraft, capable of generating oxygen and inert gas with at least one On Board Oxygen Generating System (OBOGS) (170,180,190) and selectively supplying an auxiliary supply of inert gas utilizing a waste gas output of the OBOGS (OBIGGS).
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Increasing the performance of aircraft on-board inert gas generating systems by turbocharging
TL;DR: In this article, a modular, on-board, inert gas generating system for aircraft is described, in which main components such as a heat exchanger, filter, air separation module, and turbocharger are provided in a modular unit sized to provide a variable flow of nitrogen-enriched air to the aircraft spaces to be inerted.
Patent
Oxygen sensor for aircraft fuel inerting systems
Shin-Juh Chen,Joel A. Silver +1 more
TL;DR: In this article, an apparatus and method for monitoring oxygen concentrations in fuel tank ullage comprising providing a sensor head comprising an optical cavity, exposing the optical cavity to an ambient gaseous environment of a fuel tank or air separation module, via a laser light source emitting wavelength modulated light through the cavity, and receiving the wavelength-modulated light with a detector.
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Flow control for on-board inert gas generation system
TL;DR: In this paper, an on-board inert gas generating system includes a flow control valve (28) modulated according to changes in ambient conditions to minimize changes to oxygen content within a fuel tank.
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Inerting method and apparatus for preventing and extinguishing fires in enclosed spaces
TL;DR: In this paper, the authors proposed an inerting method and apparatus to reduce the risk of and extinguish fires in an enclosed space, where the oxygen content in the space is reduced to a set base inerting level and, in the event of a fire, is quickly further reduced to complete inerting levels.
References
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Patent
Fuel tank inerting system
TL;DR: In this paper, the authors present a system for maintaining the oxygen content in the fuel vapor space of an aircraft fuel tank at less than 10 percent by volume, such system including an aspirating type mixing nozzle that draws an inert gaseous mixture from the tank vapor space and mixes it with liquid fuel being supplied to the tank whereby said inert gas mixture scrubs dissolved oxygen from the fuel and returns to the vapor space with the scrubbed oxygen therein.
Patent
Combustibly inert air supply system and method
TL;DR: In this paper, an inert gas generator removes oxygen to produce a nitrogen enriched, combustibly inert air or gas, and a converter is sized to only meet the relatively low flow rate requirements of the system.
Patent
Fuel tank inerting system
TL;DR: A pump is used to exhaust oxygen rich waste gas to ambient pressure in an inert gas generating system in order to improve the performance of the permeable membrane air separator component and to insure sufficient generation of inert gas when available source air pressure is low as mentioned in this paper.
Patent
Refueling equipment for aircraft fuel tanks and the like
TL;DR: In this paper, the fuel passing through the refueling equipment is deoxygenated by scrubbing with non-combustible ullage gas (fuel vapor, inert gas, and oxygen insufficient to support combustion) from the aircraft fuel tank or by scrbing with inert gas such as nitrogen carried by said equipment via control means operative to minimize the inert gas flow according to the fuel flow rate through the equipment into the aircraft's fuel tank, or by subjecting the fuel to partial vacuum while the fuel is agitated thus to liberate oxygen therefrom and to discharge the same from
Patent
Inerting system for fuel tanks and the like
TL;DR: An inerting system which prevents fire and explosion within an aircraft fuel tank by maintaining the O2 concentration in the vapor space thereof at less than 10 percent by volume which is below the flammable limit is presented in this paper.