航空发动机环形燃烧室噪声频谱分析及声激励源识别研究

Analysis of Noise Spectrum and Identification of Acoustic Excitation Sources in Annular Combustion Chamber of Aeroengine

论述了燃烧室的声激励源、环形燃烧室内高阶声模态及其截止频率。综合分析了燃烧室冷吹和热态各工况噪声测试结果。对声激励的高能量区、燃烧噪声主峰以及一些重要的离散频率分量进行了分析和识别。

Acoustic excitation sources, high order modes and cutoff frequencies of noise were discussed for an annular combustion chamber. A comprehensive analysis of noise measurements was made at various operating conditions with/without burning. The high energy range of acoustic excitation, the peaks of combustion noise and major discrete frequencies are identified.