Hydroturbine Intake and Penstock Geometry Design

by Gary K. Fain, Ingersoll-Rand Co, Phillipsburg, NJ, USA,
Fred F. Antunes, Ingersoll-Rand Co, Phillipsburg, NJ, USA,

Document Type: Proceeding Paper

Part of: Waterpower '85


This paper studies the intake design of one hydroturbine site and the penstock trifurcation design of another site. A hydroturbine site had been built and was in operation when vortexing was discovered at the intake of the largest turbine. A model test was performed and modifications were made to the intake to eliminate the vortices. The modifications were designed to produce a minimal head loss at the intake structure. A second hydroturbine site was designed with a trifurcation in the penstock. During the design of the penstock, the trifurcation was model tested and modified. The penstock design that produced the greatest power output from the three turbines was that which minimized the losses to the largest turbine.

Subject Headings: Water intakes | Conduits | Geometrics | Vortices | Hydraulic models | Optimization models | Head loss (fluid mechanics) | Turbines

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