Patent ID: 7770397
Filing Date: 2010-08-10
Classification: F01D,F05D,F23R

Abstract:
1. A combustor comprising an annular dome and inner and outer liners extending axially forwardly from said dome, said combustor having at least one circumferentially arranged row of impingement holes through the combustor and disposed to direct impingement cooling jets directly against a back surface of an axially forwardly extending peripheral lip of a heat shield when the heat shield is mounted inside the combustor generally parallel to the dome with said peripheral lip substantially parallel to the inner and outer liners, and said combustor having at least one circumferentially arranged row of ejecting holes defined through the combustor in a location relative to the heat shield when the heat shield is mounted inside combustor behind the heat shield relative to a general airflow direction within the combustor, the ejecting holes generally parallely aligned with the inner and outer liners of the combustor, wherein the impingement holes disposed adjacent the ejecting holes, and wherein the impingement holes and ejecting holes are circumferentially staggered relative to one another to thereby reduce interference of the respective flows through said impingement and ejecting holes; wherein the impingement holes are defined in a radiused corner between the dome and the adjacent liner, and wherein the electing holes are axially aligned with a radial gap defined between the peripheral lip and an adjacent one of said inner and outer liners.