Combustor and combustor array

Abstract

A combustor includes a distal end portion which forms a nozzle extending along an axis and opening at a distal end; an intermediate portion having a mixing surface which defines a mixing space in which air and fuel are mixed, by gradually expanding to an outer side in a radial direction of the axis from the nozzle to a rear, behind the distal end portion; a proximal end portion which forms a fuel space to which fuel is supplied from outside, behind the intermediate portion; and a plurality of air introduction pipes which penetrate the proximal end portion in a direction of the axis, have a distal end communicating with the mixing space, are arranged in a circumferential direction of the axis to surround the axis, and have a fuel supply hole formed on an inner side in a radial direction of the axis to communicate with the fuel space.

What is claimed is: 
     
         1 . A combustor comprising:
 a distal end portion which forms a nozzle extending along an axis and opening at a distal end;   an intermediate portion having a mixing surface which defines a mixing space in which air and fuel are mixed, by gradually expanding to an outer side in a radial direction of the axis from the nozzle to a rear, behind the distal end portion;   a proximal end portion which forms a fuel space to which fuel is supplied from outside, behind the intermediate portion; and   a plurality of air introduction pipes which penetrate the proximal end portion in a direction of the axis, have a distal end communicating with the mixing space, are arranged in a circumferential direction of the axis to surround the axis, and have a fuel supply hole formed on each inner side in a radial direction of the axis to communicate with the fuel space.   
     
     
         2 . The combustor according to  claim 1 , wherein the mixing surface is curved to be convex to the outer side in the radial direction of the axis in a cross-sectional view including the axis. 
     
     
         3 . The combustor according to  claim 1 , wherein the nozzle extends, while being eccentric in the radial direction with respect to the axis from the distal end side to the rear. 
     
     
         4 . The combustor according to  claim 1 , wherein the air introduction pipe extends, while being eccentric in the radial direction with respect to an auxiliary axis extending parallel to the axis from the intermediate portion side to the rear. 
     
     
         5 . The combustor according to  claim 1 , wherein the air introduction pipe is twisted to be directed from one side in the circumferential direction of the axis toward the other side, from the intermediate portion side to the rear. 
     
     
         6 . The combustor according to  claim 1 , wherein a lightening part as a hollow part is formed in a portion closer to an outer peripheral side than the nozzle at the distal end portion. 
     
     
         7 . The combustor according to  claim 1 , further comprising:
 a protruding part provided on a front side of the proximal end portion and protruding into the mixing space along the axis, the fuel supply hole being formed on an outer peripheral surface of the protruding part.   
     
     
         8 . A combustor comprising:
 a distal end portion which forms a nozzle extending along an axis and opening at a distal end;   an intermediate portion which forms a mixing space expanding from the nozzle in a direction intersecting the axis behind the distal end portion;   a proximal end portion which forms a fuel space to which fuel is supplied from outside behind the intermediate portion; and   a plurality of air introduction pipes which penetrate the proximal end portion in a direction of the axis, have a distal end communicating with the mixing space, and are arranged in a circumferential direction of the axis to surround the axis,   wherein a fuel supply hole through which the fuel space and the mixing space communicate with each other is formed on a surface facing the distal end side of a portion surrounded by the plurality of air introduction pipes in the proximal end portion, and   an extension cylinder part, which extends in the direction of the axis to cover the fuel supply hole from an outer peripheral side and has an air hole formed to communicate with the mixing space, is provided on the surface facing the distal end side.   
     
     
         9 . A combustor array comprising:
 a plurality of combustors according to  claim 1 ,   wherein the plurality of combustors are arranged in the plural in a plane orthogonal to the axis.   
     
     
         10 . The combustor array according to of  claim 9 , wherein the plurality of combustors are arranged in a grid shape at equal intervals in the plane orthogonal to the axis. 
     
     
         11 . The combustor array according to of  claim 9 , wherein each of the plurality of combustors has a hexagonal shape when viewed from the direction of the axis, and is arranged in a honeycomb shape by contacting of end faces thereof. 
     
     
         12 . The combustor array according to of  claim 9 , wherein the plurality of combustors are arranged in an annular shape. 
     
     
         13 . The combustor array according to of  claim 9 , wherein the plurality of combustors are arranged in a staggered manner so that positions of the axis differ from each other in the plane orthogonal to the axis. 
     
     
         14 . The combustor array according to of  claim 9 , wherein the plurality of combustors are arranged along a curved concave surface which is convex from one to the other.