文中推导了径流式透平的轮周效率表达式，阐述了径流式透平冲动式级的概念。
An expression for the efficiency of the wheel periphery of the radial turbine and a discussion of the concept of the degree of reaction of the radial impulse stage are given.
轮周效率只考虑定子、转子流道中的损失、余速损失，较明显地反映了流道中气流角度与涡轮效率的关系。
The crown efficiency only considers the loss in the channel of stator and rotor and the residual speed loss, clearly showing the relationship between the pneumatic angle and turbine efficiency.
利用级叶栅的实验特性，推导出模型级轮周功及效率特性在变几何前后的对应关系。
Based on the experimental feature of the cascades, the correspondent relationship of stage shaft power and efficiency between fixed and variable geometry was derived.
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