Dual-ducted area independently adjustable round-to-square binary vectoring nozzle

By designing a dual-duct area independently adjustable circular-to-square binary vector nozzle, and using an actuator and rocker arm to drive the adjusting vane, the independent duct area adjustment and heat shield cooling of the nozzle are realized, solving the problem of independent adjustment of nozzle components and improving engine performance and reliability.

CN121111528BActive Publication Date: 2026-07-10AECC SHENYANG ENGINE RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
AECC SHENYANG ENGINE RES INST
Filing Date
2025-11-12
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing turbofan variable cycle engine nozzle components need to have independently adjustable main bypass and outer bypass duct areas, but this is difficult to achieve with current technology.

Method used

A circular-to-square binary vector nozzle with independently adjustable dual-duct area was designed. The actuator drives the rocker arm to move the outer duct convergence and expansion adjustment plate, thereby realizing the independent adjustment of the second duct area. The second duct airflow is used to cool the heat shield and improve the nozzle's high-temperature resistance.

Benefits of technology

The second duct and the main duct are independent channels, resulting in low aerodynamic drag, high thrust efficiency, reduced cooling airflow requirements for the main duct, improved engine core operating conditions, and lightweight and high reliability.

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Abstract

This invention relates to a dual-duct area independently adjustable circular-to-square two-dimensional vector nozzle, belonging to the field of aero-engine technology. The nozzle includes a circular-to-square cylindrical body, a main duct and a second duct adjustment vane system, a heat shield assembly, and an actuation mechanism. The second duct airflow channel, formed by the circular-to-square cylindrical body and the heat shield, has a circular-to-square cross-section transition. The main duct airflow passes through the central cavity enclosed by the heat shield. A rocker arm-actuator mechanism independently drives the outer duct adjustment vanes to adjust the second duct area, while the main duct adjustment vanes control the throat area, exit area, and thrust vector. The low-temperature airflow from the second duct cools the heat shield. This invention integrates independently adjustable dual duct area, circular-to-square cross-section transition, and two-dimensional vector function, offering advantages such as compact structure, good thermal protection performance, and high adjustment precision.
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