Bird-strike resistant aircraft external auxiliary fuel tank leading edge structure

Abstract

The invention provides a bird-strike resistant aircraft external auxiliary fuel tank leading edge structure. The bird-strike resistant aircraft external auxiliary fuel tank leading edge structure comprises a fairing, a buffering baffle, a plug body, a front section skin I and a front section skin II, wherein the fairing is a variable-section thick wall structure; the front section skin I is connected with the fairing through a connecting piece so as to ensure that the assembling gradient between the front section skin I and the external surface of the fairing is less than 1 mm; and the buffering baffle is positioned behind the fairing and used for separating the front section skin I from the fairing so that fuels in the front section skin I and a rear structure of the front section skin I cannot enter the fairing. The invention is advantaged in that the structural design of the bird-strike resistant aircraft external auxiliary fuel tank leading edge structure is simple, and the bird-strike resistant aircraft external auxiliary fuel tank leading edge structure is very convenient to manufacture and assemble, can effectively resist flying bird strike and can also ensure that an auxiliary fuel tank cannot suffer a fuel leakage problem or a part fall-off problem to affect the flying safety of an aircraft.

Description

technical field [0001] The application relates to an anti-bird impact design of an aircraft external auxiliary fuel tank, in particular to a bird impact-resistant front edge structure of an aircraft external auxiliary fuel tank. Background technique [0002] When the aircraft is flying, if the external auxiliary fuel tank is hit by flying birds, the auxiliary fuel tank may be damaged, fuel leakage, etc. may affect the safety of the aircraft. [0003] The design of external auxiliary fuel tanks for civil aircraft must meet the provisions of Article 25.571(e)(1) of the "Airworthiness Standards for Transport Aircraft" formulated by the Civil Aviation Administration of China, that is, it must be guaranteed After the impact of the bird, the aircraft can still successfully complete the flight. The relative speed of the aircraft and the bird along the flight path of the aircraft at the time of the collision is Vc at sea level or 0.85Vc at 2,450 meters (8,000 feet), whichever is mor...

AI Technical Summary

Problems solved by technology

The first design scheme has higher requirements on the manufacturing process; the second design scheme needs to change the shape of the entire aircraft, which increases the difficulty of design, manufacture and assembly, and more test items need to be verified, which not only wastes time but also wastes manpower

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