A Mechanically Adjustable S-Bent Nozzle Nozzle Structure

Abstract

The invention discloses a mechanically adjustable S-bend nozzle nozzle structure, belonging to the field of aero-engines; it includes an S-bend section and 8 adjustment pieces, and the 8 adjustment pieces are hinged in the circumferential direction to form an annular structure; the annular structure is hinged to the S-bend. The inner wall of the rectangular outlet of the curved section constitutes a sealed air flow channel; the 8 regulating pieces are an upper regulating piece, a lower regulating piece, two side regulating pieces, two upper regulating pieces, and two lower regulating pieces; Each side regulating piece is hinged on the short sides of the rectangular outlet of the S-bend segment; the upper regulating piece and the lower regulating piece are respectively hinged on the long sides of the two sides of the rectangular outlet of the S-curve segment; the two upper regulating pieces are hinged on the between the two side adjustment pieces and the upper adjustment piece; the two lower side adjustment pieces are hinged between the two side adjustment pieces and the lower adjustment piece respectively. The invention can enhance the infrared stealth performance of the nozzle through the shielding of the high-temperature engine components by the S-bend section, and compared with the conventional axisymmetric nozzle, the infrared radiation intensity can be reduced by more than 70%.

Description

technical field [0001] The invention belongs to the field of aero-engines, in particular to a mechanically adjustable S-bend nozzle structure. Background technique [0002] With the continuous improvement of modern aviation and military technology, the survival environment of fighters is getting worse day by day. In order to gain advantages in various air battles and improve the survival rate, higher requirements are put forward for aircraft performance. The S-shaped structure of the S-bend nozzle can block high-temperature components, greatly reduce the intensity of infrared radiation, and enhance the stealth ability of the aircraft; the nozzle structure with adjustable outlet area can adapt the nozzle to different engine operating conditions and improve the overall propulsion of the engine and the aircraft. efficiency; and thrust vectoring technology can greatly improve the maneuverability and agility of the aircraft, thereby significantly improving air combat effectivene...

AI Technical Summary

Problems solved by technology

[0004] In order to avoid the deficiencies of the prior art, the present invention proposes a mechanically adjustable S-curved nozzle nozzle structure, which solves the mechanically adjustable sealing channel formed by eight interconnected adjustment pieces. There is a problem of air leakage loss in the S-bend nozzle

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