NITROGEN ENRICHED AIR SUPPLY SYSTEM AND AIRCRAFT

摘要

To provide a system which supplies nitrogen enriched air (NEA) produced by using bleed air as a supply source of the NEA to a fuel tank, and which can further improve the fuel consumption. The present invention employs an NEA supply system 10 that controls a supply in a flow control valve (FCV) 11 so as to obtain a supply flow rate Fs as a value obtained by adding a small margin flow rate Fm to a required amount Fn of nitrogen enriched air required to be supplied to a first fuel tank 15, in at least a part of a descent phase of an aircraft 100. Accordingly, explosion of the first fuel tank 15 can be prevented, and the fuel consumption of an engine 1 can be improved in the descent phase.

主权项

1. A nitrogen enriched air supply system which supplies nitrogen enriched air that is enriched with nitrogen to a fuel tank of an aircraft, the system comprising:
a nitrogen enrichment unit that produces the nitrogen enriched air upon supply of bleed air from a flight engine of the aircraft; a flow regulation unit that controls a supply of the nitrogen enriched air to the fuel tank; a residual fuel detector that detects an amount of residual fuel remaining in the fuel tank during a flight of the aircraft; and a control unit that controls the supply in the flow regulation unit and acquires information regarding the amount of residual fuel detected by the residual fuel detector, wherein the control unit controls the supply in the flow regulation unit so as to obtain a supply flow rate Fs having a predetermined relationship with a required amount Fn of the nitrogen enriched air required to be supplied to the fuel tank in at least a part of a descent phase of the aircraft, the required amount Fn being dependent upon the amount of residual fuel remaining in the fuel tank.