초록 ▼

A turbine airfoil includes at least one spar arrangement having a length less than an associated turbine airfoil length. During operation, the turbine airfoil has an outer skin surface which operates at a substantially higher temperature than that of an internal supporting parted spar arrangement. T

A turbine airfoil includes at least one spar arrangement having a length less than an associated turbine airfoil length. During operation, the turbine airfoil has an outer skin surface 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.

대표청구항 ▼

1. A turbine airfoil comprising:a blade root; a blade tip; a first side; a second side laterally opposite said first side; a blade span extending between said blade root and said blade tip; and at least one spar arrangement having a length less than a length of said blade span and positioned between

1. A turbine airfoil comprising:a blade root; a blade tip; a first side; a second side laterally opposite said first side; a blade span extending between said blade root and said blade tip; and at least one spar arrangement having a length less than a length of said blade span and positioned between said blade root and said blade tip, said spar arrangement comprising a plurality of spars, a first said spar having a width extending from said turbine airfoil first side to said turbine airfoil second side, at least one of said plurality of spars comprising at least one of a composite material and a ceramic material.