Abstract
Calculation of pressure rise in the penstock of hydro-electric power-station, etc., has been made by the author, in which the effect of head loss due to friction together with the effect of draft-tube are taken into account. By solving an ordinary differential equation of Riccati's type, the following items have been investigated : (a) Effect of head loss due to friction upon the pressure rise, the guide-vane closure being made linearly with respect to time. (b) Effect of slight concavity or convexity of guide vane closure curve upon the pressure rise, the head loss due to friction being taken into account. (c) simple approximate formula giving the amount of pressure rise, in which the effect of head loss due to friction and effect of draft-tube are taken into account.
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