Heat shield for a combustor

摘要

A heat shield includes a panel having a forward face and an aft face, a circumferential outer side and a circumferential inner side such that the panel subtends a predetermined arc, and a first radially extending side and a second radially extending side each extending from the circumferential outer side to the circumferential inner side. The panel defines an opening extending between the forward face and the aft face, a lip projecting from the forward face and extending around the opening, a rail projecting from the forward face and extending around the lip to define a cavity region between the lip and the rail, and a plurality of holes in the cavity region. Each of the plurality of holes extends from the forward face to the aft face. A region of the panel extending from the lip to the circumferential outer side is free of any aft-projecting features.

主权项

1. A heat shield for a combustor, comprising:
a panel including a forward face and an aft face, a circumferential outer side and a circumferential inner side such that the panel subtends a predetermined arc, and a first radially extending side and a second radially extending side each extending from the circumferential outer side to the circumferential inner side, the circumferential outer side facing radially outwards and the circumferential inner side facing radially inwards, the panel defining an opening extending between the forward face and the aft face, a lip projecting from the forward face and extending around the opening, a rail projecting from the forward face adjacent to a periphery of the panel and substantially enclosing the lip to define a cavity region between the lip and the rail, and a plurality of holes in the cavity region, each of the plurality of holes extending from the forward face to the aft face, wherein a portion of the holes located toward the circumferential outer side are sloped radially outwards from the forward face to the aft face at an angle of less than 80° with respect to the aft face to provide an air curtain thermally protecting the circumferential outer side, and a region of the panel extending from the lip to the circumferential outer side is free of any aft-projecting features.