A New Binary Adjustable Convergent Nozzle

Abstract

The invention relates to a novel two-dimensional adjustable contracting nozzle and belongs to the field of aero-engine nozzles. The nozzle 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) and a shield guide plate (8), 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 main carrying capacity adjustment mechanism to achieve outlet area adjustment and vector deflection, and the shield guide plate (8) is used for shielding a hot end member at the front end of the nozzle and guiding exhaust gas at the same time. 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, a defect of the conventional two-dimensional adjustable contracting nozzle in an invisibility function is overcome, and the nozzle has the advantages of small overall dimension, light weight, 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. While the conventional S-curved binary nozzle effectively shields the high-temperature components at...

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

However, the conventional S-curved binary nozzle effectively shields the high-temperature components at the front end, but the outer contour size of this nozzle is larger, the length is longer, and the weight is heavier.

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