Cooled vane structure for high temperature turbine

Claim 1

IN AN AXIAL FLOW TURBOMACHINE, A VANE COMPRISING: A RADIALLY EXTENDING VANE BODY HAVING EXTERIOR WALL SURFACES INCLUDING CONVEX AND CONCAVE SIDE WALL SURFACES INTERCONNECTING AXIALLY SPACED UPSTREAM LEADING AND DOWNSTREAM TRAILING EDGES, INTERIOR WALL SURFACES FORMING PLENUM MEANS WITHIN SAID VANE BODY ADJACENT SAID LEADING EDGE, INLET MEANS FOR ADMITTING HEAT TRANSFER FLUID TO SAID PLENUM MEANS, THROTTLING MEANS WITHIN SAID PLENUM MEANS FOR ACCELERATING THE HEAT TRANSFER FLUID AND FOR DIRECTING THE HIGH VELOCITY HEAT TRANSFER FLUID AGAINST THE INTERIOR WALL SURFACES OF SAID PLENUM MEANS IN THE LEADING EDGE REGION OF SAID VANE BODY TO GENERATE HIGH CONVECTION HEAT TRANSFER COEFFICIENTS AT THE LEADING EDGE, AND OUTLET MEANS COMPRISING A MULTIPLICITY OF PASSAGES IN THE LEADING EDGE REGION OF SAID VANE BODY INTERCONNECTING SAID PLENUM MEANS AND THE EXTERIOR WALL SURFACES, SAID PASSAGES BEING DISPOSED ALONG AXES FORMING ACUTE ANGLES WITH THE EXTERIOR WALL SURFACES SUCH THAT HEAT TRANSFER FLUID DISCHARGED FROM SAID PLENUM MEANS THROUGH SAID PASSAGES FORMS A RELATIVELY THIN LAYER OF HEAT TRANSFER FLUID ON THE EXTERIOR WALL SURFACES IN THE LEADING EDGE REGION OF SAID VANE BODY.