Experimental investigation on structural vibration induced by fluid-acoustic-structure coupling and its suppression

被引：0

作者：

Hong, Zhiliang ^{[1
]}

Xue, Li ^{[1
]}

Fu, Yilei ^{[2
]}

Chen, Lingfeng ^{[1
]}

机构：

[1] College of Safety Science and Engineering, Civil Aviation University of China, Tianjin

[2] Research Institute of Aero⁃Engine, Beihang University, Beijing

来源：

Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2024年 / 45卷 / 19期

基金：

中国国家自然科学基金;

关键词：

acoustic resonance; flow-induced structural resonance; fluid-acoustic-structure coupling; non-local acoustic liner; shedding vortex;

D O I：

10.7527/S1000-6893.2024.29970

中图分类号：

学科分类号：

摘要：

Blade vibration caused by flow-induced acoustic resonance is a typical representative of non-synchronous vibration problems inside the compressor. Existing research focuses mostly on vortex-acoustic coupling in acoustic resonance，while less attention is paid to structural vibration issues caused by acoustic resonance. To study the complex fluid-acoustic-structure coupling phenomenon in acoustic resonance，this study carried out acoustic resonance experiments on an aluminum flat plate in a low-speed wind tunnel. Synchronized measurements were performed on the shedding vortex pulsation velocity at the trailing edge of the plate，the acoustic pressure inside the duct，and the plate vibration. The experimental results captured the phenomenon of frequency locking and amplitude jumps，and found that the amplitude of plate vibration caused by acoustic resonance can reach half of the flow-induced resonance amplitude，indicating that vibration induced by acoustic resonance needs to be taken seriously in industrial applications. Finally，the acoustic resonance suppression strategy based on the non-local acoustic liner on the wall was studied，achieving dual suppression of sound pressure within the duct and plate vibration. © 2024 Chinese Society of Astronautics. All rights reserved.

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