Comubstor

Abstract

A combustor comprises a fuel flow path ( 10 ) which is a flow path for fuel (G 1 ) and which is capable of emitting the fuel to its own exterior; an air flow path ( 20 ) which is a flow path for air (G 2 ) and which is capable of emitting the air to its own exterior; and an exhaust gas flow path ( 30 ) which has a combustion region (R) wherein an air-fuel mixture that mixes the fuel and the air is burned and which constitutes an exhaust flow path for burned gas that is produced by combustion; wherein the fuel within the fuel flow path and the air within the air flow path are heated by the heat of the burned gas, and the air-fuel mixture is constituted by mixing the fuel emitted from the fuel flow path and the air emitted from the air flow path in the exhaust gas flow path.

1 . A combustor, comprising: a fuel flow path which is a flow path for fuel and which is capable of emitting the fuel to its exterior; an oxidant flow path which is a flow path for oxidant and which is capable of emitting the oxidant to its exterior; and an exhaust gas flow path which has a combustion region wherein an air-fuel mixture that mixes the fuel and the oxidant is burned and which constitutes an exhaust flow path for burned gas that is produced by combustion;
 wherein at least one or the other of the fuel within the fuel flow path and the oxidant within the oxidant flow path is heated by the heat of the burned gas, and the air-fuel mixture is constituted by mixing the fuel emitted from the fuel flow path and the oxidant emitted from the oxidant flow path in the exhaust gas flow path.   
     
     
         2 . The combustor according to  claim 1 , comprising: a first pipe of which one end is a blocked end; a second pipe which surrounds the first pipe, and of which one end on the blocked end side of the first pipe is a blocked end; and a third pipe which surrounds the second pipe, and of which one end on the blocked end side of the first pipe is a blocked end;
 wherein the interior of the first pipe constitutes one part of the fuel flow path and the oxidant flow path;   a space between the first pipe and the second pipe constitutes the other part of the fuel flow path and the oxidant flow path;   and a space between the second pipe and the third pipe constitutes the exhaust gas flow path.   
     
     
         3 . The combustor according to  claim 2 , wherein the first pipe is provided with emission ports, and the second pipe is provided with emission ports that are formed so as to be superimposed relative to the emission ports of the first pipe in a penetration direction. 
     
     
         4 . The combustor according to  claim 3 , wherein an aperture area of the emission ports of the second pipe is wider than an aperture area of the emission ports of the first pipe. 
     
     
         5 . The combustor according to  claim 3 , wherein the blocked end of the first pipe is joined to the blocked end of the second pipe, and an absorption means is provided for absorbing thermal expansion and contraction of the first pipe so that there is no slippage in the positional relations of the emission ports of the first pipe and the emission ports of the second pipe. 
     
     
         6 . The combustor according to  claim 3 , wherein ejector nozzles are installed in the emission ports of the first pipe. 
     
     
         7 . The combustor according to  claim 2 , wherein the first pipe projects from the second pipe so that the blocked end of the first pipe is positioned more toward the blocked end side of the third pipe than the blocked end of the second pipe;
 and wherein the first pipe and the second pipe are provided with emission ports, and the emission ports of the first pipe are formed more toward the blocked end side of the first pipe than the blocked end of the second pipe.   
     
     
         8 . The combustor according to  claim 7 , wherein interstices are at least discretely formed in a boundary region of the circumferential surface of the first pipe and the blocked end of the second pipe. 
     
     
         9 . The combustor according to  claim 1 , wherein the first pipe has a heat transfer region and a heat resistant region,
 the heat transfer region is exposed to an environment that is below an oxidation corrosion temperature of formative material, and has a higher thermal conductivity and a lower thermal resistance than the heat resistant region,   and the heat resistant region is exposed to an environment that is above the oxidation corrosion temperature of the formative material of the heat transfer region, and has a higher thermal resistance than the heat transfer region.   
     
     
         10 . The combustor according to  claim 9 , wherein the heat resistant region has a higher thermal resistance than the heat transfer region due to a coating that is applied to the surface of the first pipe. 
     
     
         11 . The combustor according to  claim 9 , wherein the heat resistant region is formed from material of higher thermal resistance than the formative material of the heat transfer region. 
     
     
         12 . The combustor according to  claim 9 , wherein a first member that has the heat transfer region and a second member that has the heat resistant region are formed as separate bodies,
 and the first pipe is configured by joining the first member and the second member.