Steady-periodic multiphase Computational Fluid Dynamics (CFD) simulations were conducted to capture cavitation breakdown in a Francis hydroturbine due to large-scale vaporous structures. A reduced-scale model and a full-scale prototype were investigated to display differences in vapor content and machine performance caused by lack of Reynolds and Froude similarity. The model scale efficiencies compared favorably (within 3%) to the experimental cavitation tests. The CFD model and prototype displayed distinct qualitative and quantitative differences as σ was reduced. A stage-by-stage analysis was conducted to assess the effect of cavitation on loss distribution throughout the machine. Furthermore, a formal mesh refinement study was conducted on efficiency and volume of vapor, with three mesh levels and Richardson extrapolation, to ensure convergence.
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ASME/JSME/KSME 2015 Joint Fluids Engineering Conference
July 26–31, 2015
Seoul, South Korea
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-5722-9
PROCEEDINGS PAPER
Multiphase Computation of Cavitation Breakdown in Model and Prototype Scale Francis Turbines Available to Purchase
Daniel J. Leonard,
Daniel J. Leonard
Penn State University, State College, PA
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Jules W. Lindau
Jules W. Lindau
Penn State University, State College, PA
Search for other works by this author on:
Daniel J. Leonard
Penn State University, State College, PA
Jules W. Lindau
Penn State University, State College, PA
Paper No:
AJKFluids2015-5123, V002T05A001; 19 pages
Published Online:
November 20, 2015
Citation
Leonard, DJ, & Lindau, JW. "Multiphase Computation of Cavitation Breakdown in Model and Prototype Scale Francis Turbines." Proceedings of the ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. Volume 2: Fora. Seoul, South Korea. July 26–31, 2015. V002T05A001. ASME. https://doi.org/10.1115/AJKFluids2015-5123
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