Patent ID: 8857739
Filing Date: 2014-10-14
Classification: F23R

Abstract:
1. A swirler for use with a combustor for combusting a mixture of fuel and air, the swirler comprising: a body having an outer side and an inner side; a plurality of flow guides on the inner side of the swirler body, the flow guides defining flow paths between adjacent flow guides for guiding air in a swirling motion about a centerline of the body; a first annular chamber formed within the body, the first annular chamber being in fluid communication with guide tubes located at a first end of the flow paths; a second annular chamber formed within the body, the second annular chamber being in fluid communication with apertures located at a second end of the flow paths; a channel at the centerline of the body extending from the outer side to the inner side; and a cooling assembly received in the channel, the cooling assembly having a perforated shield at an innermost end of the cooling assembly, the perforated shield being approximately flush with the body at the inner side, the perforated shield having apertures extending parallel to the centerline and entirely through the perforated shield, at least one of the apertures being disposed at the centerline, the apertures being configured to axially inject cooling flow along the centerline into a reaction chamber such that a stagnation plane is formed between the swirler and a recirculation flow of the reaction chamber.