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Numerical Generation of Hill-Diagrams; Validation on the Francis99 Model Turbine

Tengs, Erik Os; Storli, Pål-Tore Selbo; Holst, Martin
Journal article, Peer reviewed
Published version
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Tengs (Locked)
URI
http://hdl.handle.net/11250/2628542
Date
2018
Metadata
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  • Institutt for energi og prosessteknikk [2623]
  • Publikasjoner fra CRIStin - NTNU [19736]
Original version
International Journal of Fluid Machinery and Systems. 2018, 11 (3), 294-303.   10.5293/IJFMS.2018.11.3.294
Abstract
This article compares a numerically simulated, and an experimentally obtained Hill-Diagram. The Francis99 model turbine was used in the validation. By using steady-state simulations and passage modeling in ANSYS CFX, the simulation time is in the order of minutes for each operating point. Except for the smallest guide vane opening, the error in hydraulic efficiency is less than 2.5% for all flow configurations. The individual error in head and torque follow clear, almost identical trends. The error along a line of small incidence losses indicate less than 0.5% error in the efficiency in almost the complete simulated range. The results in this article may be used in future optimization design processes using HillDiagrams.
Publisher
International Association of Hydraulic Engineering and Research
Journal
International Journal of Fluid Machinery and Systems

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