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A Novel Two-Element Unilateral Expansion Nozzle

A unilateral expansion nozzle and unilateral technology, applied in the direction of jet propulsion devices, machines/engines, etc., can solve the problems of weak stealth ability, increased nozzle height and length, and inability to effectively block the front-end hot-end components, etc., to achieve reliable The effect of high performance and simple structure

Active Publication Date: 2016-05-04
AECC SHENYANG ENGINE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the hollow structure inside the traditional dual-unit single-side expansion nozzle of aero-engine, it cannot effectively shield the front-end hot-end components, resulting in a weak stealth ability. The dual-unit single-side expansion nozzle with S-curved channels or bent channels Although it can partially shield the front-end hot-end components, the height and length of the nozzle will increase, which will affect the installation of the engine on the aircraft

Method used

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  • A Novel Two-Element Unilateral Expansion Nozzle
  • A Novel Two-Element Unilateral Expansion Nozzle
  • A Novel Two-Element Unilateral Expansion Nozzle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A novel two-unit unilateral expansion nozzle mainly includes a circular and square cylinder body 1, a unilateral expansion wall 3, an adjustment plate 4, a side wall 5 of an expansion section, and a blade-shaped structure 6 for shielding swirling flow.

[0027] The front end of the round and rotating square cylinder 1 is connected with the engine as a supporting member of the entire nozzle, and the rear end is connected with the single-side expansion wall 3, the adjustment plate 4 and the side wall 5 of the expansion section. The cross-sectional area of ​​the rounded square cylinder 1 decreases gradually, forming the convergent section of the dual-unit unilateral expansion nozzle.

[0028] The unilateral expansion wall 3, the regulating plate 4 and the expansion section side wall 5 form the expansion section of the dual-unit unilateral expansion nozzle. The front end of the adjustment plate 4 is connected with the circular cylinder body 1 through a rotating pair, and th...

Embodiment 2

[0031] A novel two-element unilateral expansion nozzle mainly includes a rounded square cylinder body 1, a converging section 2, a unilateral expansion wall 3, an adjustment plate 4, a side wall 5 of an expansion section and a blade-shaped structure 6 for shielding swirling flow.

[0032] The front end of the round and rotating square cylinder 1 is connected with the engine as a supporting member of the entire nozzle, and the rear end is connected with the converging section 2 . The cross-sectional area of ​​the round-to-square cylinder body 1 is constant in size, and serves as a transition section where the cross-section of the dual-unit unilateral expansion nozzle changes from a circle to a square.

[0033] The rear end of the converging section 2 is connected with the unilateral expansion wall 3 , the regulating plate 4 and the side wall 5 of the expansion section.

[0034] The unilateral expansion wall 3, the regulating plate 4 and the expansion section side wall 5 form th...

Embodiment 3

[0037] A novel two-element unilateral expansion nozzle mainly includes a rounded square cylinder body 1, a converging section 2, a unilateral expansion wall 3, an adjustment plate 4, a side wall 5 of an expansion section and a blade-shaped structure 6 for shielding swirling flow.

[0038] The front end of the round and rotating square cylinder 1 is connected with the engine as a supporting member of the entire nozzle, and the rear end is connected with the converging section 2 . The cross-sectional area of ​​the rounded square cylinder 1 decreases gradually, and constitutes a part of the converging section of the binary unilateral expansion nozzle.

[0039] The rear end of the converging section 2 is connected with the unilateral expansion wall 3 , the regulating plate 4 and the side wall 5 of the expansion section.

[0040] The unilateral expansion wall 3, the regulating plate 4 and the expansion section side wall 5 form the expansion section of the dual-unit unilateral expan...

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Abstract

The invention relates to a novel two-dimensional single-side expansion nozzle and belongs to the technical field of aero-engine nozzles. The nozzle comprises a round-to-square barrel (1), a single-side expansion wall (3), an adjustment plate (4), extension section side walls (5) and a shield swirling leaf-shaped structure (6) and is particularly characterized in that the front end of the round-to-square barrel (1) is connected with an engine and serves as a support member of the whole nozzle; the rear end of the round-to-square barrel (1) is connected with the single-side expansion wall (3), the adjustment plate (4) and the extension section side walls (5); and the shield swirling leaf-shaped structure (6) is fixedly mounted in the round-to-square barrel (1) and mainly used for shielding a hot end member at the front end of the nozzle to achieve a good invisibility function. The nozzle has the advantages that a structure size of the conventional two-dimensional single-side expansion nozzle is ensured, a defect of the poor invisibility function of the conventional two-dimensional single-side expansion nozzle is overcome, and the nozzle has the advantages of simple structure and high reliability at the same time.

Description

technical field [0001] The invention belongs to the technical field of aero-engine nozzles, and relates to a novel dual-unit unilateral expansion nozzle with good stealth function, and is also applicable to the fields of other engine nozzles in need. Background technique [0002] Due to the hollow structure inside the traditional dual-unit single-side expansion nozzle of aero-engine, it cannot effectively shield the front-end hot-end components, resulting in weak stealth ability. The dual-unit single-side expansion nozzle with S-curved or bent channels Although the front-end hot-end component can be partially shielded, the height and length of the nozzle will increase, which will affect the installation of the engine on the aircraft. Therefore, in order to make up for the defects of the conventional binary unilateral expansion nozzle, it is necessary to design a new type of binary unilateral expansion nozzle with good stealth ability that does not affect the structural size ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02K1/78
Inventor 赵春生张少丽任利锋
Owner AECC SHENYANG ENGINE RES INST
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