NDLI: CFD-based rehabilitation for the high specific speed Francis turbine

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CFD-based rehabilitation for the high specific speed Francis turbine

Content Provider	Scilit
Author	Kubo, K. Nakashima, T. Shima, R. Enomoto, Y.
Copyright Year	2019
Description	Journal: Iop Conference Series: Earth and Environmental Science This paper present about the CFD based rehabilitation project for high specific speed (over 300 m-kW) Francis turbine. The area of rehabilitation was Spiral casing, Stay vane, Guide vane, Runner, and restricted Draft tube (draft elbow). The main goal of this project was to increase the turbine efficiency at all operating range with high operational stability, low noise as well as high cavitation performance. On the development phase of this project was carried out with CFD only (without Model test) to reduce the time of development. On the first step of this project, the shape of all components was optimized to reduce the hydraulic loss and to increase the cavitation performance with steady state CFD. After that, the operational stabilities (ex. Pressure fluctuation) on the partial load and over load point were verified with unsteady CFD. Finally, the field tests were carried out to confirm the performance of new turbine. It was found that the new turbine has excellent performance in efficiency, power output and operational stability (vibration and noise) compared with existing turbine.
Related Links	https://iopscience.iop.org/article/10.1088/1755-1315/240/2/022054/pdf
ISSN	17551307
e-ISSN	17551315
DOI	10.1088/1755-1315/240/2/022054
Journal	Iop Conference Series: Earth and Environmental Science
Issue Number	2
Volume Number	240
Language	English
Publisher	IOP Publishing
Publisher Date	2019-03-27
Access Restriction	Open
Subject Keyword	Journal: Iop Conference Series: Earth and Environmental Science Acoustics and Ultrasonics
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Physics and Astronomy Environmental Science

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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