Patent ID: 7681398
Filing Date: 2010-03-23
Classification: F02C,F23R,Y02T

Abstract:
1. A combustor and dome heat shield assembly comprising a plurality of heat shield sectors mounted adjacent and spaced apart a distance from an annular dome of the combustor, each heat shield sector having a heat shield body defined between opposed lateral edges and radially inner and outer edges, at least one fuel nozzle opening defined in the heat shield body, the heat shield body having a back face facing the combustor dome, the back face having a first plurality of protuberances extending from the back face to a first height, the first height being substantially equal to said distance, the back face having a second plurality of protuberances extending from the back face to a second height, the second height being less than the first height, the combustor having a plurality of impingement cooling holes defined through the dome, the impingement cooling holes substantially aligned with the second plurality of protuberances, wherein a ratio of a diameter of the impingement cooling holes to a height between the impingement cooling holes and tops of the second plurality of protuberances is greater than one and less than five.