叶片排旋转失速性能的研究

本文应用文献〔1〕中预测轴流压气机旋转失速性能的流动模型与方法,分析了叶片排安装角和稠度变化对旋转失速性能影响的试验结果,并得出了它们的规律性。比较了孤立叶片排与级的旋转失速性能的差异。讨论和评价了活态失速团结构模型。

STUDY OF PERFORMANCE OF ROTATING STALL IN BLADE ROW

The experimental performances of rotating stall in the blade row of altered geometric parameters are analyzed by use of the flow model and the method providedin Ref.(1). The tendencies that the performances of rotating stall vary with the stagger angles and the solidities are observed. All of blockage ratio, the performance loss and the hysteresis in stall rise with the increase of the stagger angles and the solidities. Both blockage ratio and performance loss in stall for a stage are larger than those for an isolated rotor,but the hysteresis effect of the stage is weakened due to the presence of the stator. The flow model with the active cell structure is discussed and evaluated on the basis of analyzing experimental data. The results show that the features of the active cell model should involve two atpects: (l)the mass interchange between the stall flow region and the unstall one as well as between the stall cells from the outlet to the inlet of the blade row; ( 2 ) the momentum interchange in the tangential direction of the rotor between the fluid in the stall cell and the rotor.