Abstract
It is necessary for a damage evaluation of Thermal Barrier Coatings (TBCs) to understand temperature and thermal stress in turbine blade. In the gas turbine, turbine blade surface temperature vary randomly due to fluctuation in combustion temperature. For the purpose of improving reliability of TBC and Porous-TBC (P-TBC) damage evaluation, the effect of harmonic oscillation on an unsteady state thermal stress of TBC and P-TBC was clarified. As a result, it was found that the position and geometry of pore is related to thermal stress.
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