风扇进气道胶接蜂窝声衬样件声学性能实验研究

Experimental Study on the Acoustic Property of Bonding Honeycomb Nacell Models in Compressor Inlet

使用消声短舱是降低飞机噪声的重要方法。本文介绍的高速压气机实验台架消声短舱样件的声学实验在以往基础上进行改进 ,增加了消声终端 ,使用可工程应用的胶接铝蜂窝制作的进气道消声短舱原理样件 ,测量了各压气机工况下声衬的减噪量和总压损失。测量结果表明漏气增加了总压损失 。

Using nacell to reduce airplane noise is an important method.The paper presents an experimental acoustic investigation in a high speed compressor rig,of which the measurement method has been improved based on the research work finished previously.In the experiment an anechoic termination and an inlet sound absorbing nacell model made from bonding honeycombs are used.The results were discussed,and some conclusions about the effects of liners on the acoustic field and its sound absorbing capability were obtained.