所谓反动度就是动叶栅中蒸汽膨胀的程度占级中总的应该膨胀程度的比例数，或指动叶片中焓降与这一级中静叶片和动叶片的总焓降之比。
分析了弯扭叶片中，叶片力的径向分力对沿叶高反动度的影响，及对变工况时脱流特性的影响。
This paper is intended to analyse how the radial component force which opposed on the bending blades affect the reaction along blade and flow separation characteristics of varying duty.
通过对实验测量数据与数值结果的对比，验证了低反动度附面层抽吸式压气机概念及其设计方法的可行性。
At last, the low-reaction boundary layer suction compressor concept and its design method is proved by the comparison of the experiment data and numerical results.
分析结果表明，采用专用强化叶型、控制反动度、控制攻角等方法可以有效保证空冷机组变工况安全高效运行。
It is shown from the results that the security and efficiency for LP last stage blade of air-cooling units can be obtained through adopting special profile, controlling reaction and incidences.
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