Dirt particle separator device for use in a gas turbine engine

摘要

A separator device is provided for separating dirt particles from a flow of cooling air fed to airfoils of the turbine section of a gas turbine engine. In use the separator device extends across a conduit which bypasses the combustor of the engine to convey pressurized cooling air carrying dirt particles from the compressor section of the engine to openings which direct the air into the airfoils. The separator device is configured to direct a first portion of the impinging cooling air flow away from the openings and to allow a second portion of the impinging cooling air to continue to the openings. 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.

主权项

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.