COMBUSTION BURNER, COMBUSTOR, AND GAS TURBINE

摘要

A combustion burner includes a nozzle and a swirl vane disposed in an axial flow path extending along an axial direction of the nozzle. The swirl vane includes a tip portion for swirling gas, the gas flowing through a radially-outer region of the axial flow path, and a root portion disposed on an inner side in a radial direction of the nozzle, the root portion having a cutout on a side of a trailing edge. The radially-outer region and a radially-inner region of the axial flow path communicate with each other, at least in a range in the axial direction in which the swirl vane is disposed. The swirl vane has a pressure surface, a downstream region of the pressure surface of the root portion being defined by the cutout as a curved surface which curves in a direction opposite to the swirl direction toward the trailing edge.

主权项

1. A combustion burner comprising:
a nozzle; and a swirl vane disposed in an axial flow path extending along an axial direction of the nozzle around the nozzle, wherein the swirl vane includes
a tip portion for swirling gas in a swirl direction, the gas flowing through a radially-outer region of the axial flow path, anda root portion disposed on an inner side in a radial direction of the nozzle as seen from the tip portion, the root portion having a cutout on a side of a trailing edge, wherein the radially-outer region and a radially-inner region of the axial flow path communicate with each other without being partitioned, at least in a range in the axial direction in which the swirl vane is disposed, wherein the swirl vane has a pressure surface, a downstream region of the pressure surface of the root portion being defined by the cutout as a curved surface which curves in a direction opposite to the swirl direction toward the trailing edge, wherein the pressure surface of the swirl vane at the tip portion has a curved surface curving in the swirl direction toward the trailing edge, and wherein the pressure surface of the swirl vane has a stepped portion between the curved surface of the tip portion and the curved surface of the root portion.