The present study investigates numerical calculations of temperature and thermal stress distributions near a normal cooling hole. A normal injection cooling hole was applied to evaluate TBC delamination using the local heat transfer data, which were obtained by the previous experiments. Experimental results were converted into the surface heat transfer coefficients and the adiabatic wall temperature for surface boundary conditions. Calculated results reveal that the de-bonding stresses, which yield the TBC delamination, really depends on the main stream temperature and the TBC material properties. To predict the maximum de-bonding stress near the normal cooling hole, we obtained a single correlation consisting of the TBC material properties and the main stream temperature.
|Number of pages
|International Journal of Heat and Mass Transfer
|Published - 2011 Dec
Bibliographical noteFunding Information:
This work was supported by the Power Generation & Electricity Delivery of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy .
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanical Engineering
- Fluid Flow and Transfer Processes