C208 APPLICATION OF CFD TO PERFORMANCE EVALUATION OF STEAM TURBINE

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This paper deals with an application of Computational Fluid Dynamics, CFD, to the design of a steam turbine of which working fluid is wet steam. Using a CFD code which can consider wet steam property, the present paper reports comparison between an ideal gas analysis and a wet steam analysis. Even in the wet steam region, the results of a single row analysis show good agreement, with respect to the loss coefficients and the outlet flow angles of blades, among the two CFD analyses and with the experiment of an air wind tunnel. However. However, the results of a multi-stage analysis in which state of steam intersects the saturated vapor line show difference. Results for stage analysis considering tip seal leakage are also described.
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