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首页> 外文会议>HydroVision 2008 conference technical papers >Development of an Exit Stay Apparatus for Francis Turbines
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Development of an Exit Stay Apparatus for Francis Turbines

机译：弗朗西斯涡轮机出口停留装置的开发

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In Canada and the USA, large numbers of hydropower plants utilize Francis turbines torngenerate electricity. The Francis turbines, due to the deregulated market, often operaternunder off-design conditions depending on energy demand and price. Francis turbinesrnrunning at part loads are exposed to pressure pulsation and dynamic loadings, whichrnare closely related to the vortex ropes in the draft tube. Francis turbines running at partrnloads experience significant declined energy efficiency as well. Therefore, an exit stayrnapparatus (ESA) concept was invented by Dr. A. Gokhman (US Patent 6,918,744 B2).rnThe ESA was developed to be placed immediately under the conventional Francisrnrunner to eliminate the central vortex rope, to substantially reduce the pressurernpulsation, and to increase the energy efficiency at part load. The intent behind therndesign of the ESA was that it would allow existing and new hydropower plants tornachieve increased energy production, reliable operation and a longer life expectancy.rnThis paper will present the development of the ESA for medium specific speed Francisrnturbines with maximal head between 180 and 230 meters. The theoretical approach willrnbe presented and the results will be compared with data measured at HydraulicrnMachine Laboratory's test rig of Laval University (LAMH) in the framework of arndevelopment project with Dr. Gokhman performed in 2007. The analysis of this device isrnbased on efficiency, on cavitation and on pressure fluctuation in the draft tube for all thernoperating range of the turbine. This project was funded by Natural Resources Canadarnand performed on a Francis model provided by GE Energy.
机译：在加拿大和美国，大量水力发电厂利用弗朗西斯涡轮机来发电。由于市场管制放松，混流式水轮机通常在脱机条件下运行，具体取决于能源需求和价格。在部分负荷下运行的混流式涡轮机承受压力脉动和动态负荷，这与引流管中的涡流绳密切相关。在部分负荷下运行的弗朗西斯涡轮机的能源效率也显着下降。因此，A。Gokhman博士（美国专利6,918,744 B2）发明了一种出口保持装置（ESA）的概念。开发该ESA可以直接放置在常规的Francisrnrunner下方，以消除中心涡流绳，从而大大降低压力脉动，并且以提高部分负荷下的能源效率。 ESA设计的目的是使现有和新的水力发电厂提高发电量，可靠运行并延长使用寿命。本文将介绍中压速混流式水轮机（最大扬程在180至180之间）的ESA开发。 230米将介绍理论方法，并将其结果与在2007年由Gokhman博士进行的开发项目的框架内，在Laval University（LAMH）的HydraulicrnMachine实验室测试台上测量的数据进行比较。该设备的分析基于效率，气蚀以及在整个涡轮机超温范围内导流管中的压力波动。该项目由加拿大自然资源部资助，并由GE Energy提供的弗朗西斯模型进行。

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