Patent ID: 7270175

Claim:
An extended impingement cooling structure to cool beyond an air supply plenum comprising: a inner wall; an impingement sheet; a series of supports to maintain the inner wall in spaced relation to the impingement sheet; and a baffle supported between the inner wall and the impingement sheet and having a collector plenum that receives impingement cooling air; the baffle having a channel in fluid communication with the collector plenum, the channel extending beyond the air supply plenum and having openings to allow impingement cooling air to pass therethrough and having a series of lands extending into the channel wherein the lands are located in proximity to impingement cooling air outlets in the inner wall; and said impingement sheet having a plurality of openings across a surface area, said openings directing air into said collector plenum, and at least one interfering structure mounted on a side of said impingement sheet remote from said baffle, said interfering structure preventing airflow from passing through said openings in said impingement sheet into said collector plenum at least in an area aligned with said interfering structure.