The authors present a viscous/inviscid interaction method to predict the viscous flow inside water-jet pumps, including the effects of sheet cavitation on the rotor and /or stator blades. The circumferentially averaged interaction between the rotor and the stator is accounted for in an iterative manner. The method is applied in the case of an actual water-jet pump and comparisons of the predicted and the measured rotor torque are presented.

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