Turbine airfoil

摘要

A turbine airfoil (10) includes at least one spar arrangement (11) having a length (92) less than an associated turbine airfoil length. During operation, the turbine airfoil has an outer skin surface (21) which operates at a substantially higher temperature than that of an internal supporting parted spar arrangement. The parted spar arrangement permits the turbine airfoil outer skin surface to thermally expand between spar arrangements, thus preventing self-constraining thermal stresses from forming within the spar arrangement or the airfoil skin surfaces.