Numerical evaluation of the blade cooling for the supercritical steam turbine

► Numerical solution of the CHT problem for the blade channel of supercritical steam turbine. ► The determination of the potential possibilities of using the martensitic steel for the first blades. ► Different cooling steam parameters, different turbulence levels of the main flow and the thermal barrier are examined. ► The obtained results determine the thermal potential of the applied method of the blade cooling.