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:
Jan. 27, 2009
Filed:
Dec. 22, 2005
Christian X. Campbell, Orlando, FL (US);
Bonnie D. Marini, Oviedo, FL (US);
Christian X. Campbell, Orlando, FL (US);
Bonnie D. Marini, Oviedo, FL (US);
Siemens Energy, Inc., Orlando, FL (US);
Abstract
An airfoil () for a gas turbine engine () having a source of heat for controlling a temperature gradient across the airfoil components. In one embodiment the airfoil includes a CMC outer body () defining an airfoil shape and a ceramic inner body core member () housed within and bonded to the outer body, and a heating element () disposed within the inner body core member. In another embodiment the source of heat may include a conduit () for delivering a flow of hot combustion gas from the combustor () to an interior of the airfoil. Heat energy may be delivered to the airfoil interior prior to or during startup of the engine in order to reduce the effect of temperature transients, during ongoing operation of the engine to reduce steady state temperature gradients, and/or during shutdown conditions to mitigate differential shrinkage between the core member and the outer body of the airfoil.