Patent ID: 8438853
Filing Date: 2013-05-14
Classification: F01D,F23R

Abstract:
1. An end cap assembly for use in a combustion system comprising: a generally cylindrical sleeve; an effusion plate having a first plurality of cooling holes and a first plurality of premix tube holes, the effusion plate joined to an end of the cylindrical sleeve; an impingement plate having a second plurality of cooling holes and a second plurality of premix tube holes, wherein the second plurality of cooling holes comprises a first portion and a second portion, the second portion of the second plurality of cooling holes having a larger diameter than the first portion of the second plurality of cooling holes, the second portion being located proximate a plurality of struts of the end cap assembly, the impingement plate joined to the cylindrical sleeve and oriented generally parallel to the effusion plate and spaced a first axial distance from the effusion plate; a plurality of premix tubes extending from proximate the first plurality of premix tube holes in the effusion plate and through the second plurality of premix tube holes in the impingement plate; and, wherein a supply of cooling fluid is directed through the second plurality of cooling holes in the impingement plate, onto the effusion plate, through the first plurality of cooling holes, and into a combustion liner.