航空学报2025，Vol.46Issue(2)：90-102,13.DOI:10.7527/S1000-6893.2024.30474
进气畸变条件下对转压气机失速初始扰动特征试验
Experiments on stall initial disturbance characteristics of contra-rotating compressor with distorted inflow
摘要
Abstract
A high frequency dynamic pressure sensor array arranged at the tip of the front and rear rotors is utilized to capture the stall initial disturbance characteristics of a low-speed axial contra-rotating compressor with different speed configurations and distortion conditions.The results obtained by analyzing the pressure waves collected at stall condi-tions show that the stall type at the design speed is rotating stall when the inlet flow is uniform,and the stall propaga-tion direction is consistent with the rotation direction of the rear rotor.The maturely developed stall is fixed at a circum-ferential position and does not rotate circumferentially when the speed ratio is 1.40.With further increase of speed dif-ference in the front and rear rotors,the type of stall disturbance changes again to rotating stall at the speed ratio of 1.52,and the stall disturbance propagates in the same direction as the front rotor rotation due to the reduced suction effect of the rear rotor on the front rotor wake.The stall disturbance characteristics at different speed ratios are all con-sistent with a uniform inlet when the compressor incoming flow is changed to be circumferential inlet distortion.How-ever,the distortion will cause different amplitude fluctuations in the pre-stall pressure sequence at different circumfer-ential positions.The Empirical Mode Decomposition-Local Mean Decomposition(EMD-LMD)method is employed to capture the small pre-stall perturbations that gradually accumulate energy over time.关键词
对转压气机/转速比/进气畸变/失速类型Key words
contra-rotating compressor/speed ratio/inlet distortion/stall type分类
航空航天引用本文复制引用
薛飞,秦宇奇,刘汶东,王掩刚..进气畸变条件下对转压气机失速初始扰动特征试验[J].航空学报,2025,46(2):90-102,13.基金项目
国家自然科学基金(52276039) National Natural Science Foundation of China(52276039) （52276039）
