Rotor blade row of axial flow turbine, and axial flow turbine

摘要

PROBLEM TO BE SOLVED: To provide a rotor blade row of an axial-flow turbine capable of reducing blade profile loss by matching a geometric blade inlet angle and a working fluid inflow angle while taking change in a radial direction, of an inflow angle near an end wall portion, into consideration, and simultaneously reducing secondary flow loss by reducing interference of secondary flow and a blade negative pressure face generated between blades, in the axial-flow turbine.;SOLUTION: A rotor blade row of an axial-flow turbine composed of a plurality of turbine rotor blades annularly arranged, has an auxiliary blade 3 disposed on at least one of an inner peripheral-side wall surface or an outer peripheral-side wall surface in a turbine radial direction of a flow channel formed between blades of the rotor blade row, having a blade inlet angle smaller than a blade inlet angle of the turbine rotor blade, having a blade outlet angle smaller than a blade outlet angle of the turbine rotor blade, and further having a blade front edge positioned at an upstream side in a working fluid flowing direction with respect to a blade front edge of the turbine rotor blade.;COPYRIGHT: (C)2014,JPO&INPIT