复合材料环状声衬降噪特性试验研究  

Noise Reduction Characteristics Test on Composite Material Annular Acoustic Liner

作　　者：徐健[1] 英基勇 薛东文[1] 霍施宇[1] 高翔[1] XU Jian;YING Ji-yong;XUE Dong-wen;HUO Shi-yu;GAO Xiang(Laboratory of Aeroacoustics and Vibration Aviation Technology, Aircraft Strength Research Institute, Xi’an 710065, China;AECC Commercial Aircraft Engine Co., Ltd., Shanghai 200241, China)

机构地区：[1]中国飞机强度研究所航空噪声与动强度航空科技重点实验室,西安710065 [2]中国航发商用航空发动机有限责任公司,上海200241

出　　处：《科学技术与工程》2020年第31期13047-13052,共6页Science Technology and Engineering

基　　金：国家科技重大专项(2017-Ⅱ-0008-0022).

摘　　要：根据民用飞机结构轻质化、高性能化的发展需求,利用发动机声模态模拟试验平台开展复合材料环状声衬的降噪特性试验研究,探索复合材料声衬在发动机短舱的可行性。针对发动机短舱声衬的某特定工况,以高分子树脂基复合材料,利用无缝拼接和环装整体成型等先进工艺研制出无拼缝的、两种不同长度的环状声衬试验件;通过基于旋转轴向传声器阵列方法的管内声模态测试和指向性测试开展声衬降噪效果试验。试验结果表明,声衬的降噪效果具有强烈的模态选择性,切向来流速度对声衬的降噪效果具有显著影响。The composite material annular liners were developed according to the need of lightweight and high performance civil aircraft structure.The experimental study on the noise reduction characteristics of composite material annular liner was carried out by applying in the engine acoustic spinning mode synthesizer test rig.It aimed to explore the feasibility of composite material liner in engine nacelle.For the particular condition of engine nacelle liner,two kinds of different length of liner test pieces were signed and prepared by using seamless splicing,overall molding and other advanced processes.The noise reduction characteristics of acoustic liners were achieved by means of far-field directivity test and in-tube acoustic mode based on the method of rotary axial microphone array.The experimental results show that the noise reduction effect of liner has a strong mode selectivity,and the shear flow velocity has significant effects on the noise reduction effect of sound liner.

关 键 词：复材声衬 降噪特性 声学试验 切向来流 声模态 

分 类 号：V216.54[航空宇航科学与技术—航空宇航推进理论与工程]