The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 2009
Filed:
Nov. 15, 2005
Erik Janke, Berlin, DE;
Frank Haselbach, Stahnsdorf, DE;
Christopher F. Whitney, Whetstone, GB;
Rolls-Royce Deutschland Ltd & Co KG, Blankenfelde-Mahlow, DE;
ALSTOM Technology Ltd, Baden, CH;
Abstract
Passive shroud cooling of rotor blades () is accomplished by a multitude of cooling-air flows introduced into the hot-gas flow upstream of the rotor blades on the outer circumference, these cooling-air flows, depending on the aerodynamic and geometrical conditions, being orientated at a defined radial angle and a circumferentially related tangential angle such that the cooling air primarily and essentially hits the thermally highly loaded bottom surface () of the outer shrouds () allover. In the apparatus for the performance of the method, cooling air passages () tangentially and radially orientated to the hot-gas flow are provided in an area of a casing section () which protrudes beyond the stator blades () in the downstream direction, this casing section () interrupting the transport of cooling air in the axial direction.