Nitrogen-enriched flushing inerting piping system for commercial large aircraft fuel tanks

Abstract

The invention provides a nitrogen-rich flushing inerting pipeline system for a large commercial aircraft fuel tank. An environmental control system air guide opening (1) and an NACA air inlet (4) are connected into an air mixing and pressure stabilizing device (3), then connected to a filter (9) and then connected to an air separation module (10). High-temperature and high-pressure air and outside air are introduced from the environmental control system air guide opening (1) and the NACA air inlet (4) respectively, after mixing and pressure stabilizing processing is conducted on the air through the air mixing and pressure stabilizing device (3), the mixed air is split into two parts through the air separation module (10), one part of nitrogen-rich air enters the fuel tank, and the other part of oxygen-rich air is directly emitted to the external environment. The mixed air is introduced to be purified quickly, an oxygen-rich air pipe does not need to be arranged together with an exhaust pipe of a heat exchanger, pipe system layout and system parts are optimized, the weight of the system is reduced, and maintenance is facilitated. The air temperature and pressure are controlled precisely, matching is reasonable, and the nitrogen-rich flushing inerting pipeline system is safe and capable of saving energy.

Description

technical field [0001] The invention relates to the technology of IPC classification B64D used for configuration equipment and device of aircraft power device or propulsion transmission device, especially the nitrogen-enriched flushing and inerting pipeline system of fuel tank of commercial large aircraft. Background technique [0002] Fuel tank inertization technology refers to the use of technical measures to ensure that the oxygen volume fraction in the gaseous layer above the aircraft fuel tank remains lower than the oxygen concentration required to support fuel combustion throughout the flight, so as to ensure the safety of the aircraft fuel tank. [0003] The working principle of the fuel tank inerting system is to use the rich inert gas generated by the system to fill the center wing fuel tank, and use the inert gas to reduce and reduce the space occupied by flammable gas, so as to achieve the purpose of protecting the fuel tank and improving flight safety. Generally,...

AI Technical Summary

Problems solved by technology

[0005] The design of the airborne inerting system in the prior art was initiated by the FAA. When the FAA conducted the airborne inerting system experiment on the A320 aircraft, it was found that the inerting system consumes a large amount of gas in the entire flight envelope.

Since the gas source of the inert gas is introduced from the environmental control system, it will affect the environmental control system when working on the ground and in the air

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