Abstract—

Examples of successful application of the technique for parametrically profiling the blades of axial-flow turbine machines are given. The interconnection between the cascade parameters and the profile parameters that are used for representing the blade profile’s shape is described. The influence of each of the considered parameters on the flow characteristics downstream of the cascade, in particular, on the kinetic energy losses and working fluid outlet angle, is analyzed. The initial cascade is optimized for enhancing its aerodynamic efficiency by improving the streamlining of the blade suction side and trailing edge. The optimization results were confirmed by calculation and experimental investigations. By using the developed method, the problem of designing the turbine nozzle cascade for its operation under wet steam conditions with high-efficient removal of moisture from the steam turbine flow path has been solved. Based on the elaborated recommendations for controlling droplet flows through modifying the blade profile’s shape, the profile and cascade have been designed that make it possible to obtain highly intensive growth of liquid film thickness and flowrate on the interblade channel surfaces in the places from which it can be removed through the interchannel separation slots. The accomplished set of calculation and experimental investigations has confirmed the effectiveness of the selected approach.

中文翻译：

---

参数化方法在轴流式水轮机喷嘴叶栅叶栅间轮廓分析中的应用

摘要—

给出了成功应用轴流式涡轮机叶片的参数轮廓技术的示例。描述了级联参数和用于表示叶片轮廓形状的轮廓参数之间的互连。分析了每个考虑的参数对叶栅下游流动特性的影响，特别是对动能损失和工作流体出口角的影响。最初的叶栅经过优化，可通过改善叶片吸力面和后缘的流线形来提高其空气动力学效率。通过计算和实验研究证实了优化结果。通过使用开发的方法，解决了设计涡轮喷嘴级联使其在湿蒸汽条件下运行并从蒸汽涡轮流动路径中高效去除水分的问题。基于通过修改叶片轮廓的形状来控制液滴流动的详尽建议，轮廓和叶栅的设计可以使液膜厚度高度密集地增长，并在叶片可以通过的位置在叶片间通道表面上流动通过通道间分离槽将其移除。一组完整的计算和实验研究证实了所选方法的有效性。基于通过修改叶片轮廓的形状来控制液滴流动的详尽建议，轮廓和叶栅的设计可以使液膜厚度高度密集地增长，并在叶片可以通过的位置在叶片间通道表面上流动通过通道间分离槽将其移除。一组完整的计算和实验研究证实了所选方法的有效性。基于通过修改叶片轮廓的形状来控制液滴流动的详尽建议，轮廓和叶栅的设计可以使液膜厚度高度密集地增长，并在叶片可以通过的位置在叶片间通道表面上流动通过通道间分离槽将其移除。一组完整的计算和实验研究证实了所选方法的有效性。