Prolonging thermal barrier coated specimen life by thermal cycle managementThermal barrier coatings applied to the heated side of engine components such as seals, combustor, and blades of a gas turbine offer a potential increase in efficiency through the use of higher gas temperatures or less cooling air or benefits arising from extended component life by reducing component metal temperatures. The considered investigation has the objective to show that while a thermal barrier coated (TBC) specimen can be brought to a fixed temperature using various fuel-air ratio (F/A) values, lower calculated stresses are associated with lower (F/A) values. This implies that control of (F/A) values (i.e., rates of heat input) during the starting transient and to a lesser extent during shutdown and operation, offers a potential method of improving TBC lifetime through thermal cycle management.
Document ID
19810060254
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hendricks, R. C. (NASA Lewis Research Center Cleveland, OH, United States)
Mcdonald, G. (NASA Lewis Research Center Cleveland, OH, United States)
Poolos, N. P. (Harvard University Cambridge, MA, United States)
Date Acquired
August 11, 2013
Publication Date
April 1, 1981
Subject Category
Nonmetallic Materials
Meeting Information
Meeting: International Conference on Metallurgical Coatings