GAS TURBINE COMBUSTOR

摘要

A combustor is capable of ignition and flame propagation at low fuel concentrations for gas or liquid fuel. Combustors are disposed annularly along an outer peripheral portion of a casing of a turbine. A combustion chamber burns fuel and air to generate a combustion gas. A diffusion burner is disposed upstream of the combustion chamber; and a plurality of premix burners are disposed around the diffusion burner. Cross fire tubes provide communication between combustion chambers of combustors adjacent to each other. A cross fire tube connected to a combustor adjacent to a first side in the circumferential direction of the casing is disposed so as to have a central axis passing over a premix burner as viewed from the combustion chamber and another cross fire tube connected to the combustor adjacent to a second side is disposed so as to have a central axis passing between two premix burners.

主权项

1. A plurality of combustors disposed annularly along an outer peripheral portion of a casing of a turbine, each combustor comprising:
a combustion chamber that burns fuel and air to thereby generate a combustion gas; a diffusion burner disposed upstream of the combustion chamber; a plurality of premix burners disposed around the diffusion burner; and a plurality of cross fire tubes, each providing communication between combustion chambers of combustors adjacent to each other in a circumferential direction of the casing, wherein the cross fire tube connected to the combustor adjacent to a first side in the circumferential direction of the casing is disposed so as to have a central axis passing over the premix burner as viewed from the combustion chamber, and wherein the cross fire tube connected to the combustor adjacent to a second side in the circumferential direction of the casing is disposed so as to have a central axis passing between two premix burners adjacent to each other as viewed from the combustion chamber.