Effect of guide vane on the stability of a set of hydraulic turbine runs

被引：0
|
作者：
Shi G.-T. [1 ]
Yang J.-H. [2 ]
Liu X.-B. [1 ]
Liu Y. [1 ]
机构：
[1] Key Laboratory of Fluid and Power Machinery, Department of Energy and Power Engineering, Xihua University, Chengdu
[2] Department of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou
来源：
| 1600年 / Nanjing University of Aeronautics an Astronautics卷 / 29期
关键词：
Guide vane; Hydraulic turbine; Pressure fluctuation; Stability; Vibration;
D O I：
10.16385/j.cnki.issn.1004-4523.2016.04.007
中图分类号：
学科分类号：
摘要：
In order to enhance the stability of hydraulic turbine, and reduce the vibration of hydraulic turbine when it is working, this paper added a set of guide vanes at the impeller import of hydraulic turbine, set the monitoring points through ANSYS-CFD software in the each flow passage components, and calculated the changes rule of pressure and pressure fluctuation within hydraulic turbine under the different guide vane numbers by using the turbulence model SST k-ω, transformed the calculation results of pressure fluctuation by FFT, analyzed the distribution of time domain and frequency domain within each flow passage components, finally, analyzed and summarized the results. The study found that the dominant frequency amplitude of pressure fluctuation is minimum in the volute when the guide vane numbers is equal to nine. With the increase of guide vane numbers, the greatest amplitude of pressure fluctuation is gradually decreased in the impeller, but the effect of the guide vane numbers on amplitude of pressure fluctuation is smaller in the draft tube. The method that a set of guide vanes are added to the impeller import of hydraulic turbine can good reduce amplitude of pressure fluctuation, enhance the stability of hydraulic turbine, but the guide vane numbers neither too much nor too little. © 2016, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
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页码：609 / 615
页数：6
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