流-声-固耦合诱发结构振动及其抑制实验  

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

作　　者：洪志亮 薛力 付怡磊 陈凌峰 Zhiliang HONG;Li XUE;Yilei FU;Lingfeng CHEN(College of Safety Science and Engineering,Civil Aviation University of China,Tianjin 300300,China;Research Institute of Aero?Engine,Beihang University,Beijing 100191,China)

机构地区：[1]中国民航大学安全科学与工程学院,天津300300 [2]北京航空航天大学航空发动机研究院,北京100191

出　　处：《航空学报》2024年第19期202-214,共13页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(52276045,52206062)。

摘　　要：流体诱发声共振引起叶片振动是压气机内部非同步振动问题的典型代表。现有研究多关注声共振中的涡声耦合,而对声共振引发的结构振动问题较少涉及。为了研究声共振中复杂的流-声-固三场耦合现象,在低速风洞中开展了铝制平板的声共振实验,对平板尾缘脱落涡脉动速度、管道内声压、平板振动进行了同步测量。实验结果捕获了频率锁定、幅值突跃现象,发现声共振引起的平板振动幅值可达流致结构共振幅值的50%,表明声共振诱发振动在工业应用中需引起重视。最后,研究了基于壁面非局域声衬的声共振抑制策略,实现了对管道内声压、平板振动的双重抑制。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.

关 键 词：声共振 流致结构共振 脱落涡 流-声-固耦合 非局域声衬 

分 类 号：V21[航空宇航科学与技术—航空宇航推进理论与工程]