Petal type noise reduction D-shaped thrust vectoring nozzle

Abstract

The invention discloses a petal type noise reduction D-shaped thrust vectoring nozzle which is composed of a front end steering part, a circle rotation D type transition part, a rear end steering partand a petal type spout. The circle rotation D type transition part is fixedly connected with the front end steering part and the rear end steering part, the front end steering part is located on thefront portion of the circle rotation D type transition part, and the rear end steering part and the petal type spout are connected and located on the rear portion of the circle rotation D type transition part. The thrust vectoring nozzle is installed on an outlet of an engine turbine, and the front end steering part is rotated at any angle within 360 degrees by controlling the circle rotation D type transition part to be rotated. A petal type shell is located at the rear end of an outer shell, and evenly divided into an inner duct and an outer duct in the circumferential direction of a centercaudal vertebra, and the petal type shell enables air exhausted from the outer duct to flow towards the inner duct and air exhausted from the inner duct to flow outwards. When fuel gas is sprayed out,the contact area between airflow and external air is increased, and the airflow exhaust speed and exhaust noise are lowered. The thrust vectoring nozzle has the advantages of being simple in structure and flexible to operate.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to a petal-shaped noise-reducing D-shaped vector nozzle. Background technique [0002] In the field of engine technology, the tail nozzle is to continue to expand the gas after the turbine, fully convert the remaining heat in the gas into kinetic energy, and make the gas eject from the nozzle at a high speed. For supersonic aircraft engines, the total expansion ratio of the gas in the tail nozzle can reach more than 10-20. The traditional convergent tail nozzle will cause the gas to not fully expand, resulting in a large thrust loss. The converging section of the tail nozzle is fixed and cannot be adjusted, and the diffusing section is adjusted by multiple adjusting pieces. At the same time, the convergent afterburner shell is used as the converging section, and the multi-adjusting piece nozzle is opened under the afterburning state to form a diffusing section. . The section ...

AI Technical Summary

Problems solved by technology

But it does not have the performance to reduce detectability, nor does it have the ability to reduce noise

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