本文通过把一台船用动力涡轮的二级设计改型成一级的设计实践,论述了大焓降涡轮级的设计方法及其特点。设计是采用完全径向平衡的子午面流线曲率法进行的。为了达到大焓降又不使级的气动性能恶化的设计目标,采用了控制旋涡的设计概念。文章通过对二种设计结果的分析比较,探讨了大焓降涡轮设计的利弊,尤其是针对船用动力涡轮的设计,提出了一些观点和建议。 This paper discusses the design method and characteristics of a large enthalpy turbine stage by redesigning the second stage design of a marine power turbine into a level one design. The design is based on a fully radially balanced meridional streamline curvature method. In order to achieve a large enthalpy drop without deteriorating the aerodynamic performance of the class, a control concept was adopted. Through the analysis and comparison of the two design results, the article discusses the advantages and disadvantages of the design of large enthalpy turbine, especially for the design of marine power turbine, and puts forward some opinions and suggestions.