Turbofan engine and bleed valve device

By introducing a grille into the vent valve device of the turbofan engine to break up rainwater droplets and control airflow, the performance degradation problem of the turbofan engine when rainwater enters is solved, and the impact of rainwater on engine performance is effectively reduced and stability is improved.

CN122106784APending Publication Date: 2026-05-29AECC COMML AIRCRAFT ENGINE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
AECC COMML AIRCRAFT ENGINE CO LTD
Filing Date
2024-11-28
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

When rainwater enters a turbofan engine, the rainwater in the duct affects the operating characteristics of the compressor and combustion chamber, leading to a decrease in performance. Existing venting valve devices have failed to effectively reduce the impact of rainwater on engine performance.

Method used

An air venting valve device was designed, including an air venting window, a valve plate, a grille, and a baffle. The grille breaks up rainwater droplets in the inner channel, increasing the relative velocity between air and water droplets to reduce the droplet size and improve the evaporation effect. The movement of each component is controlled by a drive mechanism to regulate the airflow.

Benefits of technology

It effectively breaks up raindrops, reducing the amount of rainwater entering the combustion chamber, minimizing the impact of rainwater on engine performance, and improving the engine's operational stability and efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

A turbofan engine and a bleed air door arrangement for reducing the effects of rain on engine performance. The bleed air door arrangement includes a bleed air window, a valve plate, and a grid; the bleed air window is configured in an intermediate casing between an outer and an inner duct, through the intermediate casing; the valve plate extends upstream from a downstream edge of the bleed air window into the inner duct to open the bleed air window; the grid extends from the valve plate into the inner duct to break up water droplets in the inner duct.
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