Thus it was proved that a multi-stage steam turbine could be decomposed into multiple single-stage steam turbines in performance, the performance model of multi-stage steam turbine was deduced according to the model of single-stage steam turbine. 从而证明多级蒸汽透平在性能上可以分解为多个单级蒸汽透平进行模拟,并利用单级蒸汽透平性能模型推导出多级蒸汽透平性能模型。