关键词: 流场, 汽轮机, 设计, 动力特性, 反旋流, 静力特性, 密封, 振动

Abstract: After improving the design of the 11th stage’s flow passage of 18MW steam turbine made by Nanjing Turbine and Electric Machinery, Co. Ltd. , the aerodynamic performance of this stage is improved greatly. As a result, the efficiency of this stage is raised notably. It provides a valuable experience for the improvement of middle and small turbomachinery.

Key words: Design, Flow field, Steam turbine, Anti-swirl flow, Dynamic characteristic, Static characteristic, Vibration, Seal