燃气轮机高速动力涡轮气动设计及试验

High-speed power turbine aerodynamic design and test verification

基于30 MW级燃气轮机增压机组动力涡轮设计要求及其研制特点、难点,在注重强度寿命的前提下开展了高速动力涡轮及排气系统的气动设计。完成了两级高速动力涡轮的一维方案设计、叶片造型设计和排气系统设计,并进行了准三维分析和全三维流动评估。动力涡轮直接串装燃气发生器,开展了燃气轮机整机工厂性能试验。试验结果表明:该动力涡轮气动效率和排气段总压恢复系数均超过指标要求,燃气轮机整机热效率超过设计要求0.6个百分点。

Under the full consideration of the strength and life, the aerodynamic design of a high-speed power turbine and exhaust casing were completed according to design requirements and characteristics of power turbine for a 30 MW gas turbine booster. One dimensional scheme design of two stage high-speed power turbine, 3D blade design and exhaust system design were completed. And the analysis of quasi three-dimensional flow- field and full three-dimensional flow- performance were also carried out. The power turbine was fit on the gas generator to carry out performance test. The results indicated that the aerodynamic efficiency of the power turbine and total pressure recovery coefficient of exhaust system exceeded design requirements. The thermal efficiency of gas turbine was 0.6% higher than design point.