Transient analyses provide estimates of maximum pressure in the Great Falls Unit 1 penstock following load rejection. Additional transient analyses, along with hydrodynamic force and moment coefficients, provide estimates of unsteady loads on the Unit 1 emergency butterfly valve during closure. Position varying force and moment coefficients for a butterfly valve were determined by CFD modeling. A new method for representing turbine and pump-turbine characteristics that involves a slight modification to the standard Suter representation permits linear interpolation between the discrete curves representing data at different wicket gate openings.
Transient Analyses for Great Falls Hydro Plant
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Schohl, GA. "Transient Analyses for Great Falls Hydro Plant." Proceedings of the ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. Volume 1: Fora, Parts A, B, C, and D. Honolulu, Hawaii, USA. July 6–10, 2003. pp. 2857-2864. ASME. https://doi.org/10.1115/FEDSM2003-45258
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