压气机失速过程的转子叶尖端壁压力场频率特性  

Investigation on the Frequency Characteristics of the Rotor Tip Pressure for Compressor Stall

作　　者：李成龙[1] 李军[1] 罗志煌[1] 杨朴[2] 李凡玉[1] 

机构地区：[1]空军工程大学等离子体动力学重点实验室,西安710038 [2]陆军航空兵学院飞行理论系,北京101123

出　　处：《科学技术与工程》2013年第30期9127-9132,9138,共7页Science Technology and Engineering

摘　　要：为了研究压气机转子叶片通过频率(blade passing frequency,BPF)特性与压气机气动稳定性之间的内在联系;并准确辨识不同状态下的流动特征。对某单级轴流压气机转子叶尖处壁面静压进行了频谱分析。结果表明:压气机转子BPF特性的变化能反映其流动状态,BPF一阶幅值的最大位置首先出现在转子叶尖中部靠后;随着压气机的不断节流,该位置会不断前移,当其接近前缘附近时失速发生。随着转速的增大,各测量点BPF一阶幅值都会相应增大;并且失速后失速团相对转子的旋转速度减小。在压气机失速之前,转子前缘处压力信号的BPF一阶幅值不断增大;进入失速后会迅速降低,此特征可以作为该压气机失速预警及判别失速的标准,具有较大的应用前景。To investigate the internal relationship between blade passing frequency （BPF） characteristic of compressor rotors and aerodynamic stability of a single-stage axial compressor and identify the flow pattern at different conditions,the compressor end wall static pressure signals under the rotor tip were analyzed using frequency analysis technology.The results show that：the variation of compressor rotor BPF characteristic can reflect flow transient of the compressor,the position of the most value of the BPF located behind middle part of the rotor tip,then the position transfer to the leading edge when compressor stall.The magnitude of BPF increased with the increasing of the rotor speed for 6 sensors and the rotating speed decreased relative to the rotor.The magnitude of BPF increases at all times before stall happened for the signal at the leading edge and reduces after stall,this characteristic could be used to assess the stall margins during compressor throttling,and it has certain value in engineering application.

关 键 词：压气机 失速过程 转子叶尖 动态压力 频谱分析 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]