轴流压气机中旋转失速的研究

 提出了一种可预测各类进口非均匀性影响的压缩系统动态失速的理论模型。并重点分析了旋转失速发展过程中“失速前奏波”的特性以及进口总压畸变的影响等。分析结果表明；小幅值的“失速前奏波”阶段可持续４０至１００个转子旋转周期,而且阀门关闭的终止位置、进气畸变等对其有较大的影响。与已有实验数据的比较表明该模型是正确可靠的。

AN INVESTIGATION OF ROTATING STALL IN AXIAL COMPRESSORS

A method is provided to predict how the rotating stall will develop in axial compres-sion systems with both uniform and nonuniform inlet flow,and the rotating stall transient and its growth proeess with both uniform and cireumferential total pressure distorted inlet flow are in-vestigated in detail.It has been found that the rotating stall is preeeded by a period which will last for 40～100 rotor revolutions and in which small amplitude waves travel around the circumfer-ence and evolve smoothly into rotating stall without sham change in phase or amplitude. The throttle ramping and the inlet distortion have a crucial effect on the period and stall transient.