Gas turbine with pyrometer

Abstract

A gas turbine with at least one stationary stator blade and at least one rotor blade that can be rotated during operation is provided. The gas turbine has at least one optical waveguide embedded into a first rotor blade. The optical waveguide is oriented such that thermal radiation of a region of the first stator blade can be detected by the optical waveguide. An analyzing device is designed to analyze the thermal radiation and to ascertain the temperature of the region of the first stator blade, the temperature being ascertainable along a path from which the radiation is emitted during the rotation of the first rotor blade.

1 . A gas turbine, comprising
 at least one stationary stator blade and at least one rotor blade which can be rotated during operation,   at least one optical waveguide, which is embedded in a first rotor blade and is aligned such that thermal radiation of a region of the first stator blade can be detected by the optical waveguide, and   an evaluation device for evaluating the thermal radiation, which is configured to determine the temperature of the region of the first stator blade, it being possible to determine the temperature along a path from which the thermal radiation emanates in the course of the rotation of the first rotor blade.   
     
     
         2 . The gas turbine as claimed in  claim 1 , wherein the first rotor blade comprises a photodetector for converting the thermal radiation into electrical signals. 
     
     
         3 . The gas turbine as claimed in  claim 2 , wherein the photodetector is fed by wireless energy transfer. 
     
     
         4 . The gas turbine as claimed in  claim 1 , wherein the optical waveguide is guided into the shaft of the first rotor blade and terminates there. 
     
     
         5 . The gas turbine as claimed in  claim 4 , wherein the end of the optical waveguide in the shaft is provided with a collimator. 
     
     
         6 . The gas turbine as claimed in  claim 5 , wherein the collimator is configured to emit the emerging radiation in an axial parallel beam. 
     
     
         7 . The gas turbine as claimed in  claim 4 , wherein the radiation coming from the collimator is detected with the aid of a detection device, wherein the reception range of the detection device is formed over so large an area that substantially all radiation coming from the collimator can be detected. 
     
     
         8 . The gas turbine as claimed in  claim 7 , wherein the detection device has a cover or sleeve to prevent ambient light from scattering in. 
     
     
         9 . The gas turbine as claimed in  claim 7 , wherein the detection device is an optical waveguide or a bundle of optical waveguides for passing on the radiation to a photodetector. 
     
     
         10 . The gas turbine as claimed in  claim 7 , wherein the detection device is a photodetector. 
     
     
         11 . The gas turbine as claimed in  claim 1 , wherein a lens collimator is provided in the region of the end of the optical waveguide pointing toward the first stator blade. 
     
     
         12 . The gas turbine as claimed in  claim 1 , wherein the optical waveguide is tapered at its end.