Patent ID: 7628020

Claim:
A combustor comprising inner and outer liners extending longitudinally from a dome wall about the central axis of the combustor to define an annular enclosure therebetween, the inner and outer liners having a plurality of angled effusion holes defined therethrough, each of the effusion holes having a hole direction defined along a central axis thereof and toward the enclosure, the hole direction of each of the effusion holes having a tangential component defined tangentially to a corresponding one longitudinally extending section of the inner and outer liners and perpendicularly to the central axis of the combustor, the tangential component of all of the effusion holes corresponding to a same rotational direction about the central axis of the combustor to swirl a flow coming in the enclosure through the effusion holes along the same rotational direction, wherein the inner and outer liners define first and second longitudinally extending annular sections of the annular enclosure with the first section being adapted to receive a plurality of fuel nozzles and the second section being located downstream of the first section, the hole direction of each of the effusion holes, in a radial plane having a longitudinal component defined tangentially to the corresponding one of the liners, and wherein the longitudinal component of each of the effusion holes in the first section of the outer liner is directed away from the second section towards the dome wall and the longitudinal component of each of the effusion holes defined in the second section of the outer liner is directed away from the first section and the dome wall.