【摘要】 斜切口短舱进气道的稳态流动畸变随短舱缩短而加剧。为探究该类进气道对压气机特性和噪声的影响，设计一种斜切口进气道并开展地面压气机室内实验。结果表明：设计的斜切口进气道与风扇的间距为2.3倍管径时，基本不影响风扇的压升、效率特性及失速起始模式；该斜切口进气道出口声场的频谱特性和模态与标准进气道相似，但稳态流动畸变对转静干涉噪声存在干扰。模态分析显示，理论模型预测不完全适用于研究对象TA29实验台；此外，斜切口进气道的不对称性会导致前传至进气道的噪声在更多非主导模态上被激发或削弱。更多还原

【Abstract】 The steady flow distortion induced by the drooped intakes intensifies with the design trend of shortening the nacelle length. To investigate whether drooped intakes impact compressor performance and noise, this study designed a drooped intake and conducted compressor experiments under static intake conditions. Experimental results demonstrate that for the subject investigated, at a distance of 2.3 times the duct diameters upstream of the fan, the drooped intake exerts negligible influence on fan pressure rise and efficiency characteristics and does not alter its stall inception pattern. The spectral characteristics and mode composition of the exhaust sound field from the drooped intake align with those of standard intakes, while steady flow distortion perturbs rotor-stator interaction noise. Mode analysis reveals that theoretical modes are not fully applicable to the TA29 experiment rig examined herein. Additionally, the asymmetry of the drooped intake enhances or suppresses upstream-propagating noise modes across multiple non-dominant mode orders.更多还原