Axial flow turbine assembly

摘要

A turbine assembly is provided. A turbine assembly includes at least one stator assembly including a radially inner band (56) and at least one stator vane extending radially outward from the inner band, the stator vane includes an airfoil including a root portion (284) adjacent the inner band and a tip portion (282), the airfoil further includes at least one lean directional change (128) defined between the root portion and the tip portion. A turbine assembly further includes at least one turbine blade assembly including at least one rotor blade, the blade assembly coupled in flow communication with the stator assembly such that an axial spacing is defined therebetween, wherein the axial spacing defined adjacent to the at least one lean directional change (128) is wider than the axial spacing defined adjacent to the root portion