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Closed circuit steam cooled turbine shroud and method for steam cooling turbine shroud

United States Patent

May 21, 2002
View the Complete Patent at the US Patent & Trademark Office
A turbine shroud cooling cavity is partitioned to define a plurality of cooling chambers for sequentially receiving cooling steam and impingement cooling of the radially inner wall of the shoud. An impingement baffle is provided in each cooling chamber for receiving the cooling media from a cooling media inlet in the case of the first chamber or from the immediately upstream chamber in the case of the second through fourth chambers and includes a plurality of impingement holes for effecting the impingement cooling of the shroud inner wall.
Burdgick; Steven Sebastian (Schenectady, NY), Sexton; Brendan Francis (Simpsonville, SC), Kellock; Iain Robertson (Simpsonville, SC)
General Electric Company (Schenectady, NY)
09/ 567,296
May 8, 2000
This invention was made with Government support under Government Contract No. DE-FC21-95-MC31176 awarded by the Department of Energy. The Government has certain rights in this invention.