大型民机增升装置噪声分析

随着低噪声发动机的使用,飞机机体噪声所占比例日益增大。尤其在飞机进场阶段,机体噪声中的增升装置噪声不容忽视。着重讨论了大型民机增升装置的噪声原理、降噪技术和预测方法,分析了增升装置前缘缝翼和后缘襟的流动特性,并阐述其噪声特性。然后对几种增升装置降噪技术的应用和发展进行了总结。最后介绍了气动噪声的几种预测方法。

Analysis of Large Civil Aircraft High-Lift Devices Noise

With the advent of quieter engine,the proportion of airframe noise has increased. Especially during the airplanes' approach for landing,high lift devices can be a prominent source of airframe noise. The paper focuses on discussing the noise principle,the noise reduction technologies and the prediction methods. Then introduces the flow characteristics of leading edge slat and trailing edge flap and elaborates the noise characteristics. After that,the application and development of several noise reduction technologies are summarized. At last the prediction methods are introduced.