Abstract: To remove moisture from the steam flow path of steam turbines, one or more grooves are located on the pressure or concave side of the steam turbine stationary and/or rotating airfoils. The grooves are oriented predominantly radially and are disposed close to the airfoil trailing or exit edge. Moisture deposited on the surface of the airfoil flows into the groove and, due to pressure and/or centrifugal forces, the moisture flows to the turbine inner or outer sidewall and, thus, is available for removal from the steam path in the same blade row in which it was first deposited. An advantage of removing moisture in the blade row in which it was first deposited is that it reduces efficiency losses associated with the chronology of the moisture downstream of the airfoil trailing edge.

Abstract: To remove moisture from the steam flow path of steam turbines, one or more grooves are located on the pressure or concave side of the steam turbine stationary and/or rotating airfoils. The grooves are oriented predominantly radially and are disposed close to the airfoil trailing or exit edge. Moisture deposited on the surface of the airfoil flows into the groove and, due to pressure and/or centrifugal forces, the moisture flows to the turbine inner or outer sidewall and, thus, is available for removal from the steam path in the same blade row in which it was first deposited. An advantage of removing moisture in the blade row in which it was first deposited is that it reduces efficiency losses associated with the chronology of the moisture downstream of the airfoil trailing edge.