Combustor and gas turbine

Abstract

A combustor is equipped with first burners each adopted as a main burner circulating a primary air to generate an air-fuel mixture, second burners each adopted as the main burner circulating the primary air in a direction opposite to the first burners to generate another air-fuel mixture. A plurality of main burners are disposed at intervals in a circumferential direction, and the first burner and the second burner are disposed in a non-periodic arrangement pattern over an entire circumference in the circumferential direction.

1 . A combustor comprising:
 a plurality of first burners each adopted as a main burner circulating a primary air in one direction to generate an air-fuel mixture; and   a plurality of second burner each adopted as the main burner circulating the primary air in the other direction opposite to the first burners to generate another air-fuel mixture,   wherein the main burners are disposed at intervals in a circumferential direction the combustor, and   the first and second burners are disposed in a non-periodic arrangement pattern over an entire circumference in the circumferential direction.   
     
     
         2 . The combustor according to  claim 1 , wherein the first and second burners are disposed in an asymmetric arrangement pattern in the circumferential direction. 
     
     
         3 . The combustor according to  claim 1 , wherein the first and second burners are disposed in an arrangement pattern in which a concentration center of heat release rate of all the plurality of main burners is shifted away from a central position in the circumferential direction. 
     
     
         4 . The combustor according to  claim 1 , wherein the first and second burners are disposed in an arrangement pattern in which a magnitude of a composite vector obtained by combining each of unit vectors according to a direction of a radial flow occurring at a boundary between the first and second burners in the circumferential direction is equal to or greater than magnitudes of the unit vectors. 
     
     
         5 . The combustor according to  claim 1 , wherein, in a condition where the plurality of main burners disposed at intervals in the circumferential direction are divided in the circumferential direction into groups each including one or some of the main burners adjacent to each other in the circumferential direction and each groups includes the same number of the main burners,
 an arrangement relationship between the first and second burners in at least one of the groups is different from other groups.   
     
     
         6 . A gas turbine comprising the combustor according to  claim 1 .