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.

Volume Subject Area:
Water Hammer
Keywords:
hydroturbine, simulation, transient, valve forces
Topics:
Transient analysis, Valves, Stress, Computational fluid dynamics, Emergencies, Fluid-dynamic forces, Gates (Closures), Hydraulic turbines, Interpolation, Modeling, Pressure, Pump turbines, Simulation, Transients (Dynamics), Turbines
This content is only available via PDF.
Copyright © 2003
 by ASME
You do not currently have access to this content.