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:
Sep. 17, 2013
Filed:
Mar. 26, 2010
Christian X. Campbell, Oviedo, FL (US);
Christian X. Campbell, Oviedo, FL (US);
Siemens Energy, Inc., Orlando, FL (US);
Abstract
A turbine airfoil (B) with a thermal expansion control mechanism that increases the airfoil camber () under operational heating. The airfoil has four-wall geometry, including pressure side outer and inner walls (B), and suction side outer and inner walls (B). It has near-wall cooling channels (F,A,F,A) between the outer and inner walls. A cooling fluid flow pattern (C,W,H) in the airfoil causes the pressure side inner wall (B) to increase in curvature under operational heating. The pressure side inner wall (B) is thicker than walls (B) that oppose it in camber deformation, so it dominates them in collaboration with the suction side outer wall (), and the airfoil camber increases. This reduces and relocates a maximum stress area () from the suction side outer wall () to the suction side inner wall (B,) and the pressure side outer wall ().