Gas Turbine Combustor

Abstract

In a gas turbine combustor 3 of the present invention, an air hole plate 20 includes a center air hole group 51 configured from a plurality of air holes 51 A and 51 B and a plurality of outer circumferential air hole groups 52 configured from a plurality of air holes 52 A, 52 B, and 52 C and formed to surround the center air hole group 51. The gas turbine combustor 3 includes a hole part 601 and a temperature sensor 401 provided on the air hole plate 20 to be located in a region surrounded by two outer circumferential air hole groups 52 adjacent to each other and the center air hole group 51, a supply source 220 of coolant, a cooling pipeline 205 that connects the hole part 601 and the supply source 220, valves 67 and 68 provided in the cooling pipeline 205, and a control system 500 that drives the valves 67 and 68 on the basis of a measured value of the temperature sensor 401.

What is claimed is: 
     
         1 . A gas turbine combustor including a plurality of fuel nozzles that inject fuel, an air hole plate including a plurality of air holes formed to correspond to the plurality of fuel nozzles, the air hole plate being provided on a downstream side in a flowing direction of the fuel of the plurality of fuel nozzles, and a combustion chamber that causes the fuel and an air injected from the plurality of air holes to burn to generate combustion gas,
 the air hole plate including a center air hole group configured from the plurality of air holes and a plurality of outer circumferential air hole groups configured from the plurality of air holes and formed to surround the center air hole group,   the gas turbine combustor comprising:   a hole part and a temperature sensor provided on the air hole plate to be located in a region surrounded by a pair of the outer circumferential air hole groups adjacent to each other and the center air hole group;   a supply source of coolant;   a cooling pipeline that connects the hole part and the supply source;   a valve provided in the cooling pipeline; and   a control system that drives the valve on the basis of a measured value of the temperature sensor.   
     
     
         2 . The gas turbine combustor according to  claim 1 , wherein the hole part is formed on a straight line extending from a center of the air hole plate and passing between the two outer circumferential air hole groups adjacent to each other. 
     
     
         3 . The gas turbine combustor according to  claim 1 , wherein the control system includes:
 a temperature comparator that compares the measured value of the temperature sensor and a setting value; and   a calculation part that outputs a signal to the valve when the measured value of the temperature sensor is larger than the setting value.   
     
     
         4 . The gas turbine combustor according to  claim 1 , wherein at least one other hole part is further provided on the air hole plate to be located between the two outer circumferential air hole groups adjacent to each other. 
     
     
         5 . A gas turbine plant comprising:
 a compressor that compresses air;   the gas turbine combustor according to  claim 1  that mixes the compressed air supplied from the compressor with fuel and burns the compressed air and the fuel; and   a turbine driven by combustion gas supplied from the gas turbine combustor.