Theoretical Performance Investigation of Mixed-Flow Variable-Pitch Reversible Pump-Turbines
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In this paper, at first, an approximate theory is developed for the mixed-flow turbomachines based on the boundary value problems. The relations between the cascade characteristics and the geometries can be very easily determined by the theory. Then, for the variable-pitch reversible pump-turbines the characteristic diagrams of twelve rotors are obtained to examine the effects of the blade camber and the passage-angle.
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