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Aircraft fuel system

A fuel system and aircraft technology, applied in the direction of adjusting fuel, power plant fuel supply, aircraft parts, etc., can solve the problems of increasing aircraft operating costs, reducing reliability, and increasing the weight and cost of aircraft platforms.

Inactive Publication Date: 2015-06-03
AERO SYST CONSULTANTS
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  • Description
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AI Technical Summary

Problems solved by technology

Such inerting system solutions add significant weight and cost to the aircraft platform due to reduced reliability and increased maintainability, and may significantly increase the operating costs of the aircraft

Method used

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  • Aircraft fuel system
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Embodiment Construction

[0047] The following description is a description of methods, systems and processes for the development of aircraft fuel tank flammability reduction systems. Details of a method of using fuel distribution structures and fuel cooling methods for the development of such a system to control the flammability of aircraft fuel tanks are set forth.

[0048] Background information and details of current "state-of-the-art" systems and methods have not been included and are assumed to be readily available to a person experienced in the art of such system development. The reference numerals, details and characteristics contained in the respective textual elements and figures are intended to illustrate various embodiments of the invention. Accordingly, other embodiments can have different elements in this regard, without departing from the intent or scope of the present invention. Similarly, embodiments of the invention may be practiced without some of the details described in this appli...

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Abstract

Aircraft fuel system reduces flammability exposure of fuel tanks. In one embodiment, aircraft center fuel tank fuel is cooled in flight to reduce flammability exposure to be similar to that of an unheated metal wing tank. Fuel tanks having adjacent heat sources are insulated to minimize heat flow into the fuel. Fuel tanks having lower cooling properties, e.g., composite wing tanks, are cooled during flight so temperatures are reduced to be similar to metal wing tanks. A fuel tank, pressurized relative to outside pressure at altitude, having lower flammability exposure than unpressurized tanks and cooling fuel in the tank reduces flammability exposure of the fuel tank to be similar to that of an unpressurized metal wing tank. Recirculating flow from a tank, passing through heat exchanger, and returning to the tank cools fuel. A controller starts / stops fuel flow to tanks and uses sensors to command flow to reduce flammability.

Description

technical field [0001] The present invention relates to aircraft fuel systems, and more particularly to systems for improving aircraft safety and reducing aircraft vulnerability due to fuel tank flammability. It is mainly used in commercial aircraft. Background technique [0002] There is an increasing demand for aircraft fuel tank flammability reduction solutions, primarily to enable commercial aircraft to comply with fuel tank flammability reduction specifications. These specifications describe the requirements for commercial aircraft fuel tank flammability exposures to be equivalent on a group-wide average basis to unheated conventional aluminum wing fuel tanks. [0003] Contemporary commercial aircraft incorporate fuel tank inerting systems or in-tank oxygen reduction methods to reduce the flammability exposure of their fuel tanks on a group-wide average basis. This is a result of regulations being enforced by the FAA, EASA, and other regulatory authorities around the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64D37/00B64D37/04B64D37/34
CPCB64D37/04B64D37/34B64D37/32
Inventor P·E·琼斯
Owner AERO SYST CONSULTANTS
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