Abstract
When a pressure pulsation is generated at the lower end of a penstock, due probably to the action of draft-tube, etc., the pressure wave is propagated to the penstock, and under certain condition a state of resonance may occur. In this paper the author has made theoretical estimation about the condition at which this resonance state can be established, making a simple asumption regarding the relation between pressure and velocity of flow at the lower end of the penstock. The estimation is made for both cases of uniform and non-uniform wall thickness of the penstock.
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