Patent ID: 8745988

Claim:
A heat shield unit for a gas turbine engine combustor, comprising: a panel body adapted to be secured to a combustor liner, the panel body having a first surface adapted to be oriented toward a combustion zone of a combustor, and a second surface adapted to be oriented toward the combustor liner, the panel body as a whole being railless and being separated in an upstream portion and a downstream portion; pin fins projecting from the second surface of the panel body, the pin fins being arranged in arrays of at least two different densities of volume of pin fins per unit volume, with one said densities in the upstream portion and another said densities in the downstream portion of the panel body, with a first density of the at least two different densities being lower than a second density of the at least two different densities; and connectors to connect the panel body to the combustor liner with a line between the upstream portion and the downstream portion of the panel body being aligned with fluid-coolant injection apertures in the combustor liner.