摘要
发动机风扇作为涡扇发动机最主要的噪声源之一,因此,对风扇噪声预测模型的影响因素进行评估对新型发动机的设计制造和适航评估具有重要的意义。通过对风扇噪声的产生机理及声音在传播过程中的影响因素进行研究,利用MATLAB软件进行编程,分析了在不改变其它参数的前提下,通过改变风扇转子和静子间距比对风扇噪声的预测结果的影响,为发动机在设计阶段的降噪和控制噪声提供一定的理论依据。
Engine fan noise is one of the most important noise sources of turbofan engine.Therefore,evaluating the influencing factors of fan noise prediction model is of great significance for the design and manufacture of new engine and airworthiness assessment.Through the research on the mechanism of fan noise and the influencing fac原tors of sound in the process of propagation,it is programmed by MATLAB software and the prediction result of fan noise by changing the fan rotor-stator pitch ratio without changing other parameters is analyzed Which provides some theoretical basis for the engine noise reduction and control noise in the design stage.
作者
闫国华
戴康宁
YAN Guo-hua;DAI Kang-ning(College of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China)
出处
《装备制造技术》
2018年第1期181-183,190,共4页
Equipment Manufacturing Technology
关键词
风扇噪声
噪声预测
影响因素
转静子间距比
fan noise
noise prediction
influencing factors
rotor-stator pitch ratio
