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当代汽轮机气动热力技术已发展到以新一代叶型、弯扭叶片为代表的全三维时代，即第３ 代。文章讨论了第３ 代技术的内涵、基本特征和技术开发思路，介绍了所开发的新技术及其在国产２００ＭＷ 老机组通流部分现代化改造中应用的情况。试验表明，改造后机组通流部分效率提高约５ ％ ，出力可增加１０ ％ ，机组性能达到了先进水平。
Contemporary steam turbine aerodynamic technology has been developed to a new generation of leaves, curved torsion leaves as the representative of the all-dimensional era, the third generation. This paper discusses the connotation, basic characteristics and technical development ideas of the third generation technology, introduces the new technology developed and its application in the modernization of the flow passage of the homemade 200MW old unit. The test shows that after the transformation, the efficiency of the flow-through part of the generating unit can be increased by about 5%, the output can be increased by 10% and the performance of the unit has reached the advanced level.