中文摘要：

以离心式透平为研究对象,用完全气体作为流动介质,进行一维热力设计计算与分析,推导出轮周效率ηu的关系式,得到其与反动度Ω、速比xa、径比D2/D1、扩张角、进口总温、进出口压比、进口角α1、动叶速度系数ψ、静叶速度系数φ等九个参数相关。在透平进出口压比一定、进口总温一定、静叶出口气流角一定且动、静叶的速度系数认为已知的条件下,分别研究剩下的四个参数对级效率的影响,最终得到一组最佳参数范围,为离心式透平的设计提供可靠的依据。

英文摘要：

Using ideal gas as flowing medium,Centrifugal turbine is researched by one-dimensional thermal design calculation and analysis;the relationship is reduced,which is between wheel circumference ηu and the nine parameters,reactionary degree Ω,ratio xa,diameter ratio D2/D1,divergence angle,inlet total temperature,pressure ratio of inlet and outlet,inlet angle α1,rotor speed coefficientΨ,stator speed coefficient φ With settled rotor and stator speed coefficient,pressure ratio of inlet and outlet,inlet total temperature,inlet angle α1 and the influence to wheel circumference of the rest four parameters,There can get a set of best parameters to be used as a reliable basis for the centrifugal turbine design.