A plug nozzle and its engine exhaust system, aircraft

Abstract

The invention discloses a plug type spray pipe, an engine exhausting system provided with the same and an aircraft. The plug type spray pipe comprises a box-shaped body, a first cone, a second cone, a first rotor, a second rotor and a slide block, wherein the first cone and the second cone are fixedly arranged in the box-shaped body, the box-shaped body, the first rotor, the second rotor, the first cone and the second cone form a space, throat channels are formed between the first rotor and the second rotor and the box-shaped body respectively, the areas of the throat channels can be changed according to the shapes of the first rotor and the second rotor, and the slide block is arranged in the space and used for receiving high-pressure air provided by an air source and is pushed by the high-pressure air to drive the first rotor and the second rotor to rotate. When the first rotor and the second rotor of the plug type spray pipe rotate, the areas of the throat channels can be changed according to the shapes of the first rotor and the second rotor. By means of the structure, the thrust of the aircraft can be adjusted by changing the areas of the throat channels in the rising process.

Description

technical field [0001] The invention relates to the field of aircraft, in particular to a plug nozzle, an engine exhaust system with the same, and an aircraft. Background technique [0002] Glossary: [0003] Afterburner is the process in which the thrust of the engine exceeds the maximum operating state in a short period of time. Engine afterburning shortens the takeoff roll distance of the aircraft. Military aircraft can use it to increase flight speed, climb rate and maneuverability during combat. The engine achieves afterburner by increasing the exhaust flow and exhaust velocity. [0004] The development of the aircraft has led to a very wide range of the engine's working envelope, and the pressure ratio of the nozzle can reach dozens or even hundreds, and the afterburner needs to be turned on during the ascent process. The throat area of ​​the nozzle is adjustable, so that the thrust given by the engine to the aircraft can be adjusted by adjusting the area of ​​the ...

AI Technical Summary

Problems solved by technology

[0005] The plug-type nozzle has an external expansion effect, which can satisfy a wide range of falling pressure ratios. The nozzle has good aerodynamic performance, and can shield high-temperature parts of the engine. The pipe structure is fixed, which cannot meet the requirements of the engine with adjustable throat area when the state changes

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