噪声与振动控制Issue(2)：91-95,5.DOI:10.3969/j.issn.1006-1335.2015.02.022
航空涡扇发动机喷气噪声分离技术
Study on Jet Noise Separation Technique of Turbofan Engines
摘要
Abstract
Turbofan engine nozzle is one of the main sources of aircraft noise. The noise generated by the nozzle has a negative effect on airworthiness certification of aircrafts. It is also an important indicator of engine performance. In order to realize the noise reduction design of the engine, it is necessary to separate the noise of each component from the total engine noise to reduce its noise individually. In this paper, the jet noise separation method was proposed based on the engine noise data acquired by 3 far-field microphones. The program for this method was developed in MATLAB. With the use of the en-gine noise test data of the General Electric Company as the input data, the jet noise was separated from the total engine noise to obtain the self-correlation spectra of the jet noise sound pressure and calculate SPL of the jet noise. The jet noise data ob-tained by this method is important for the noise reduction design of engine nozzles.关键词
声学/涡扇发动机/喷气噪声/噪声分离/MATLAB编程Key words
acoustics/turbo fan/jet noise/noise separation/MATLAB programming分类
资源环境引用本文复制引用
闫国华,金宗亮..航空涡扇发动机喷气噪声分离技术[J].噪声与振动控制,2015,(2):91-95,5.基金项目
大型民用客机发动机噪声合格符合性标准体系研究(400686） （）
