为验证燃气涡轮的总体性能，将某重型燃气轮机涡轮末两级按0.5模化比模化后进行空气透平试验，建立了多级空气透平的试验系统，分析两级试验透平轮周效率、流量系数等特性参数随速比的变化。试验结果表明：空气透平设计工况效率达到了0.895，流量系数0.78，接近原燃气涡轮的设计值。试验结果验证了涡轮的总体性能，对燃气轮机涡轮的开发设计具有重要指导意义。

To verify the overall performance of a gas turbine，the 0.5 modeling ratio air turbine test of the last two stages of a heavyduty gas turbine was carried out after modeling.A multistage air turbine test system was establishedto analyze the variation of characteristic parameters such as turbine wheel circumference efficiency and flow coefficient parameters with speed ratio.The test results show that the efficiency of air turbine design condition reaches 0.895 and the flow coefficient reaches 0.78,which is close to the design value of the original gas turbine.The test results verify the overall performance of the turbine,which have important guiding significance for the development and design of gas turbine.

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