Abstract
In this article a preliminary design of the last stage of supercritical steam turbine has been presented. A computational model of supercritical thermal cycle has been created in order to determine steam parameters at the stage inlet and outlet. The model was based on the structure of German coal-fired power plant Datteln 4. Further steam-flow parame-ters and dimensions of stator and rotor blades have been calculated analytically. Stage geometry has been created and steam flow through designed stage upper-part has been simulated. Operating conditions of steam turbine last stages have been discussed and protective anti-erosion coating of blades surfaces has been proposed.
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