Patent ID: 7281895
Filing Date: 2007-10-16
Classification: F01D,F05D

Abstract:
1. A turbine vane, comprising: a generally elongated hollow airfoil having a leading edge, a trailing edge, a pressure side, a suction side, a first end adapted to be coupled to a shroud assembly, and a second end opposite the first end adapted to be coupled to a manifold assembly; a convergent flow channel having an inlet generally at the first end of the generally elongated hollow airfoil and extending toward the second end of the generally elongated hollow airfoil; wherein the convergent flow channel has a first cross-sectional area proximate to the first end of the generally elongated hollow airfoil that is larger than a second cross-sectional area of the convergent flow channel closer to the second end of the generally elongated hollow airfoil than a location of the first cross-sectional area; a plurality of impingement channels extending from the convergent flow channel toward the leading edge and terminating in a leading edge cavity aft of an inner surface of the leading edge; and wherein the plurality of impingement channels vary in length such that a first channel located closest to the first end of the generally elongated hollow airfoil is shorter than a second channel closest to the second end of the generally elongated hollow airfoil.