Patent ID: 8398364

Claim:
A turbine stator vane comprising: an airfoil extending between an inner diameter endwall and an outer diameter endwall; a vortex flow retaining chamber formed within one of the inner diameter endwall and the outer diameter endwall in a leading edge region of the airfoil, the vortex flow retaining chamber having a horseshoe shape and opening onto a hot gas flow surface of the one of the inner diameter endwall and the outer diameter endwall, to enable a hot flow gas to enter into the vortex flow retaining chamber; a vortex flow tube extending from one side of the one of the inner diameter endwall and the outer diameter endwall to an opposite side of the one of the inner diameter endwall and the outer diameter endwall, the vortex flow tube passing through the vortex flow retaining chamber; a row of cooling air exit holes connected to the vortex flow tube and opening onto the hot gas flow surface of the one of the inner diameter endwall and the outer diameter endwall; and, a row of cooling air supply holes opening into the vortex flow tube to supply cooling air.