Abstract
The latest diagonal flow reversible pump turbine has a tendency towards increasing speed. On that occasion, cavitation phenomenon in pumping operetions is a serious problem for the maintenance.
It is, however, very difficult to measure the impact pressure due to cavitation along the surface of the blades.The paucity of reports on the measurement of the impact pressure on the blades due to cavitation so far have prompted us to investigate it.
Thereupon, an experiment was made on the influence of the changes of rotating speed and runner vane opening on the change of pressure distribution, using a model of movable diagonal flow reversible pump turbine.The pressure distribution due to cavitation was visualized by Fujifilm Prescale(pressure detecting sheet).
