Abstract
In order to clarify the unsteady characteristics of an impulse turbine with self-pitch-controlled guide vanes in a reciprocating flow, an experimental investigation has been made by a turbine equipment in which the sinusoidal flow conditions are simulated. The results have been compared with those of a Wells turbine and the analytical results that are calculated on the basis of the experimental data obtained by the model testing of a turbine rotor with fixed guide vanes under steady unidirectional flow conditions. As a result, it has been clarified that the impulse turbine presented here is superior to the Wells turbine both in starting characteristics and speed reduction of rotor. The quasi-steady analysis is available for this turbine.
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