Gas turbine temperature measuring apparatus

Claim 1

GAS TEMPERATURE MEASURING APPARATUS FOR MEASURING THE TEMPERATURE OF GASES IN THE ANNULAR FLUID FLOW PASSAGEWAY OF A GAS TURBINE ENGINE, SAID GAS TEMPERATURE MEASURING APPARATUS COMPRISING IN COMBINATION: (A) A CYLINDRICAL CASING ENCLOSING THE ANNULAR FLUID FLOW PASSAGEWAY, (B) A PLURALITY OF CIRCUMFERENTIALLY SPACED, RADIALLY EXTENDING VANES TRAVERSING THE ANNULAR PASSAGEWAY, (C) A PLURALITY OF OPENINGS IN SAID CASING EACH RADIALLY OUTWARD OF A RESPECTIVE ONE OF SAID VANES, (D) EACH OF SAID VANES HAVING A HOLLOW INTERIOR FORMED BY RADIALLY SPACED INNER AND OUTER END WALLS AND SIDE WALLS CONNECTING AXIALLY SPACED UPSTREAM LEADING AND DOWNSTREAM TRAILING EDGE PORTIONS, (E) EACH VANE HAVING A PLURALITY OF RADIALLY SPACED OPENINGS IN THE LEADING EDGE AND AT LEAST ONE OPENING ADJACENT THE TRAILING EDGE, (F) A RADIALLY EXTENDING TRANSVERSE WALL DIVIDING THE INTERIOR OF EACH VANE INTO A RADIALLY EXTENDING MIXING CHAMBER ADJACENT THE LEADING EDGE AND A SECONG CHAMBER ADJACENT THE TRAILING EDGE, (G) A PASSAGE ADJACENT ONE END OF THE VANE PROVIDING FLUID FLOW COMMNICATION BETWEEN THE MIXING AND SECOND CHAMBERS, (H) THE OUTER END WALL OF EACH VANE HAVING AN OPENING THEREIN DOWNSTREAM OF THE TRANSVERSE WALL EACH OF SAID OPENINGS BEING RADIALLY ALIGNED WITH A RESPECTIVE ONE OF THE OPENINGS IN THE CASING, (I) A PLURALITY OF PROBES EACH EXTENDING RADIALLY INWARD THROUGH AN ASSOCIATED SET OF OPENINGS IN SAID CASING AND IN AN OUTER END WALL OF ONE OF SAID VANES INTO THE SECOND CHAMBER OF THE RESPECTIVE VANE, (J) A PLURALITY OF THERMOCOUPLES EACH SUPPORTED BY A RESPECTIVE ONE OF SAID PROBES WITHIN THE SECOND CHAMBER OF THE RESPECTIVE VANE, (K) SEALING MEANS BETWEEN EACH OF SAID PROBES AND THE OPENING IN THE OUTER END WALL OF THE RESPECTIVE VANE, (L) AND MEANS ELECTRICALLY CONNECTING THE PLURALITY OF THERMOCOUPLES IN PARALLEL SUCH THAT THE AVERAGE ELECTROMOTIVE FORCE PRODUCED CAN BE DETERMINED.