NDLI: Numerical simulation of a cavitating draft tube vortex rope in a Francis turbine at part load conditions for different σ-levels

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Numerical simulation of a cavitating draft tube vortex rope in a Francis turbine at part load conditions for different σ-levels

Content Provider	Scilit
Author	Wack, Jonas Riedelbauch, S.
Copyright Year	2017
Description	Journal: Journal of Physics: Conference Series In the present study, numerical investigations of a Francis turbine at model scale are performed. A part load operating point is selected for the analysis with a focus on the cavitating draft tube vortex rope. For three σ-levels, different aspects are investigated. First, the extension of the vapor volume is analyzed and compared to high-speed visualization recordings from the measurements. Furthermore, the pressure fluctuations for different σ-levels are analyzed and compared to experimental data at a measuring point in the draft tube cone. Finally, the impact of the different cavitation volumes on the axial and circumferential velocity distribution is investigated. In addition, the SST and SAS turbulence models are compared for two pressure levels.
Related Links	http://iopscience.iop.org/article/10.1088/1742-6596/813/1/012019/pdf
ISSN	17426588
e-ISSN	17426596
DOI	10.1088/1742-6596/813/1/012019
Journal	Journal of Physics: Conference Series
Volume Number	813
Language	English
Publisher	IOP Publishing
Publisher Date	2017-04-04
Access Restriction	Open
Subject Keyword	Journal: Journal of Physics: Conference Series Marine Engineering Numerical Simulation Draft Tube Tube Vortex Cavitating Draft Vortex Rope Francis Turbine Part Load Pressure Fluctuations
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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