Optimal structure of transition for Francis turbine stay ring was obtained through computing and analysis.
通过对混流式水轮机座环过渡段进行分析，获得了过渡段的最优结构。
This paper describe the blade stress state of Francis turbine in the course of starting, load rejection, stalling by analysing the field test data.
本文通过分析近期的现场测试数据，给出了混流式水轮机转轮叶片在启动、甩负荷、停机三种过渡工况下的应力状态。
In this paper, the technology of nc machining of Francis turbine blade is presented.
主要论述了混流式水轮机叶片的数控加工工艺。
Cracks in Francis turbine runner blades threaten the safety, stability and economic profits of the hydropower station.
混流式水轮机转轮叶片裂纹故障严重影响了水电站的安全稳定运行和经济效益的发挥。
This paper systematically introduces the fatigue design methods of Francis turbine runner.
本文系统而简要地介绍了混流式水轮机转轮疲劳设计方法的研究成果。
The study on flow field in front and at back of a Francis turbine runner is very important for the runner in its hydraulic design and characteristic improvement.
混流式水轮机转轮前后的流场研究对于转轮水力设计，改善其性能有着重要意义。
This paper discusses the methods of reducing pressure pulsation in high load zone of Francis turbine models.
针对混流式模型水轮机研发中有关降低高部分负荷压力脉动的方法进行了探讨。
Experience gained from these turbines are useful for the future large high-head Francis turbine design.
该水轮机的经验对今后大型高水头混流式水轮机的设计将是有益的。
In this paper, the stresses analysis on prototype runner in power station and model runner proved that there is a linear relationship between blade stress and output of Francis turbine.
通过电站真机与模型转轮应力测试结果的分析证明，混流式转轮叶片应力与机组出力之(？)存在线性关系。
The measuring system with microcomputer for inlet and outlet flow field of the Francis turbine runner is described. The pitot probe with 5 holes was used as sensing element.
本文研制的微机检测系统用于转轮进出口流场测量，系统采用5孔探针为感应元件，全部数据处理及计算都由计算机完成。
The unsteady flow in a draft tube of Francis turbine under the off-design operation is produced by the dynamic behavior of a helical vortex rope with the dead core.
混流式水轮机在非设计工况点下运行时，尾水管内部的非定常流动是由死水域和螺旋涡带的动态行为引起的，尾水管上部的螺旋涡带旋转引起流动的基频脉动。
There iss strong vibration in the draft tube of a Francis turbine or axial flow fixed blade propeller hydraulic turbine when the turbine is running on part loading.
混流和轴流定浆式水轮机在部分负荷下运行时，尾水管中常出现较为强烈的振动。
For a long time, the vibration phenomenon of Francis turbine-generator units strongly affects the safe work of the units and attracts the close attention of people.
混流式水轮发电机组的振动长期以来一直严重影响机组的安全运行，因而为人们所密切关注。
A brief presentation on computer aided hydraulic design of Francis Turbine runners is given, the general principle of which are also applicable to centrifugal and mixed flow pump runners.
概要介绍混流式水轮机转轮计算机设计的水力设计方法，其一般原理同样适用于离心泵和混流泵叶轮的设计。
In this paper, the finite element method is used for the calculation of S1 streamline surface of Francis turbine runner with half vanes.
本文采用有限元法对带半叶片的混流式转轮的S1流面进行了流场计算。
And necessary machine tools, hydraulic pressure and vacuum supporting systems as well as main tools are explained already in the nc machining technology of Francis hydraulic turbine blades.
对所需的机床、液压支撑、真空支撑系统和主要刀具已在混流式叶片数控加工工艺中进行了说明。
So it provided a scientific basis for fatigue study of Francis turbine runner.
为混流式转轮疲劳研究提供了科学依据。
A new type hydraulic turbine which is called tubular-Francis turbine is described in this paper. The performance of this turbine is compared with that of Francis turbine.
本文介绍了一种称之为贯流混流式水轮机的新机型，并就其性能与混流式水轮机进行了详细的比较。
In chapter 1, the existed problem and current research on vibration of hydropower house with large-sized Francis turbine generator unit are introduced.
第一章介绍了大型混流机组厂房的振动问题及研究现状。
Efficient aircraft, the pilot shows that when the concentration of 3%, more than 55% of high-Francis, when the concentration of 5%, more than 80% of high-turbine, Francis than 20%.
该机效率高，试验对比表明，当浓度为3%时，比混流式高55%，当浓度为5%时，比涡轮式高80%，比混流式高20%。
Efficient aircraft, the pilot shows that when the concentration of 3%, more than 55% of high-Francis, when the concentration of 5%, more than 80% of high-turbine, Francis than 20%.
该机效率高，试验对比表明，当浓度为3%时，比混流式高55%，当浓度为5%时，比涡轮式高80%，比混流式高20%。
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