Abstract
A theory for the determination of the aerodynamic losses in a flat-bladed rotor operating under partial admission conditions is taken from a previous paper. It is adapted to obtain a formula for the loss coefficients for a real turbine rotor operating under partial admission conditions. An approximate but much simplified version of this formula is developed for certain cases. The loss formulae derived are verified using three turbine rotors of different blade pitch. The formulae are shown to be approximately correct and the effect of blade pitching is shown to be negligible. A method (numerical example) of predicting the stage efficiency of partial admission turbines is also given.
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