Novel two-dimensional adjustable contracting nozzle

Abstract

The invention provides a novel two-dimensional adjustable contracting nozzle which comprises a round-to-square barrel (1), a fixed runner plate (2), side walls (3), actuators (4), link mechanisms (5), a contracting adjustment plate (6), a nozzle enclosure (7), a bracket (8), a shield swirling leaf-shaped structure (9) and a thin-wall square structure (10), wherein the round-to-square barrel (1) serves as a support member of the whole nozzle, the actuators (4), the link mechanisms (5) and the contracting adjustment plate (6) serve as a carrying capacity adjustment mechanism to achieve outlet area adjustment and vector deflection, and the bracket (8), the shield swirling leaf-shaped structure (9) and the thin-wall square structure (10) form a two-dimensional shield swirling center body structure for shielding a hot end member at the front end of the nozzle. The nozzle has the advantages that an adjusting range of a throat area of the conventional two-dimensional nozzle is ensured, and the nozzle has good invisibility, and the advantages of small overall dimension, simple structure and high reliability.

Description

technical field [0001] The invention belongs to the field of aeroengine nozzles, and relates to a novel binary adjustable convergent nozzle. Background technique [0002] Due to the hollow structure inside, the traditional binary adjustable convergent nozzle of aero-engine cannot effectively shield the front-end hot-end components, resulting in very weak stealth ability. However, the conventional binary plug vector nozzle only adds a closed center body at the center of the nozzle. This kind of closed center body has a large cross-sectional area, which seriously affects the adjustment range of the throat area of ​​the nozzle, thereby affecting the performance of the engine. Working point: In order to ensure the normal throat adjustment range of the aero-engine, it is necessary to increase the structural size of the nozzle, resulting in an increase in the weight of the nozzle. Therefore, in order to make up for the defects of conventional binary adjustable converging nozzles ...

AI Technical Summary

Problems solved by technology

[0002] Due to the hollow structure of the traditional aero-engine binary adjustable convergent nozzle, it cannot effectively shield the front-end hot-end components, resulting in very weak stealth capabilities

However, the conventional binary plug vector nozzle only adds a closed center body at the center of the nozzle. This kind of closed center body has a large cross-sectional area, which seriously affects the adjustment range of the throat area of ​​the nozzle, thereby affecting the performance of the engine. Working point; in order to ensure the normal throat adjustment range of the aero-engine, it is necessary to increase the structural size of the nozzle, resulting in an increase in the weight of the nozzle

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