Open type rotor, stator blade thereof and noise reduction method

By adjusting the bending appearance of the static blades, the open rotor noise and the static noise phase cancel each other in the time domain, solving the problem of high open rotor noise, achieving effective noise reduction and taking into account both aerodynamic efficiency and strength.

CN120556985AActive Publication Date: 2025-08-29AECC COMML AIRCRAFT ENGINE CO LTD
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Patent Information

Application Number
CN202511073407.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-01
Publication Date
2025-08-29
Estimated Expiration
2045-08-01

AI Technical Summary

Technical Problem

The open rotor is noisy, and the existing technology has bottlenecks in noise reduction. In particular, traditional noise reduction methods are difficult to apply in open structures that lack installation space, and the strength of the bionic structure is relatively large, making it difficult to apply engineering.

Method used

By adjusting the bending profile of the static cow blade, especially the bending design at the leading edge and tail edge, the sound pressure of the static cow blade and the moving cow blade is cancelled in the time domain to achieve noise reduction.

Benefits of technology

It effectively reduces the noise of static interference, takes into account the aerodynamic efficiency and strength requirements, and meets the noise reduction needs of open fans.

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Abstract

The invention provides an open type rotor, a stator blade thereof and a noise reduction method, and the noise reduction method comprises the following steps: enabling the stator blade to be in a swept-curved shape, and enabling the sound pressure of the stator blade on at least part of time domain to be counteracted with the sound pressure of a rotor blade on the part of time domain under the swept-curved shape, thereby effectively reducing the noise of rotor-stator interference noise.
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