Industrial turbine stator vane
AssigneeFlorida Turbine Technologies, Inc.
InventorGeorge Liang
Life of this patent
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Abstract
An industrial engine turbine stator vane with a three-pass aft flowing serpentine cooling circuit and turn channels formed outside of the endwalls that connect adjacent legs of the serpentine flow circuit. A ceramic core used to cast the vane includes dual print-outs extending from the turn channel forming pieces that provide a more rigid core structure to prevent core shift or movement during casting. The dual core print-outs form purge air holes for the rim cavity that is then covered with cover plates if purge air holes are not required.
Claims2
A turbine stator vane for an industrial gas turbine engine, the vane comprising:
- an airfoil extending between an outer diameter endwall and an inner diameter endwall;
- a three-pass serpentine flow cooling circuit with a first leg located along a leading edge of the airfoil and a third leg located adjacent to a trailing edge of the airfoil;
- an inner diameter turn channel located below the inner diameter endwall and connected between the first leg and a second leg of the serpentine flow circuit;
- an outer diameter turn channel located above the outer diameter endwall and connected between the second leg and the third leg of the serpentine flow circuit;
- a row of exit cooling holes located along a trailing edge of the airfoil and connected to the third leg;
- a purge air hole connected to an end of the third leg;
- two purge air holes formed in the inner endwall turn channel and covered with an inner diameter turn channel cover plate;
- and,
- two purge air holes formed in the outer endwall turn channel and covered with an outer diameter turn channel cover plate.
Dependencies are inferred from the claim text.