The paper describes a computer program which combines the streamline curvature throughflow calculation method with one-dimensional wet steam theory. Two subsonic applications are described in detail: (i) the nucleating flow in a convergent-straight annular duct and (ii) the flow in a 14-stage model high pressure turbine. Comparisons are made between the full nonequilibrium and conventional equilibrium solutions. Experimental results for the turbine show that the decrease in efficiency between dry and wet operation is underestimated by the theoretical calculation.

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