Author(s): R. Logar; Klasinc; Steinman
Linked Author(s):
Keywords: Reservoir; Maintenance valve; Hollow-cone valve; Butterfly valve; Disk version; Through-flow version; Hydraulic model; Euler; Froudesimilarity law
Abstract: Outlet and maintenance valves were studied for a reservoir mainly used for irrigation. As relatively high flow velocities were expected and as it had to be possible to close the maintenance valve under full load, the valves were subjected to a hydraulic scale-model test. Two designs were tested, a solid disk butterfly valve and a through-flow version. The water supply at the laboratory was not sufficient to fulfill the required pressure at the entrance to the model according to Froude's law of similitude. Therefore Euler's law of similitude was used to determine the flow and pressure relationship between prototype and model. By means of a simple example the authors demonstrate that the flows determined by Froude's respectively Euler's law agree very well in a wide range of head variation.
Year: 2001