Patent ID: 8943791
Filing Date: 2015-02-03
Classification: B01D,F01D,F02C,F05D,Y02T

Abstract:
1. A separator device that separates dirt particles from a flow of cooling air fed to airfoils of the turbine section of a gas turbine engine comprising: an array of scoops that direct a first portion of impinging cooling air flow away from openings which direct the air into the airfoils and to allow a second portion of the impinging cooling air to continue to the openings; and an impingement surface provided on the array of scoops, wherein the separator device has a plurality of through-holes formed on the impingement surface through which the second portion of the cooling air passes to continue to the openings, wherein the separator device is located in a conduit which is radially outwards of a working gas annulus, wherein the separator device extends, in use, across the conduit which bypasses a combustor of the engine to convey pressurized cooling air carrying dirt particles from a compressor section of the engine to the openings, and wherein the first portion of cooling air has a higher concentration of the coarsest dirt particles carried by the cooling air than the second portion of cooling air.