Abstract
A localized delamination modeling method based on a thin-wall thermal resistance model is developed in this study. Numerical investigations are then conducted with this model to analyze the influence of factors such as the position, area, shape, and depth of localized delamination on blade cooling efficiency. Firstly, the simulation results of two coating modeling methods (the thin-wall thermal resistance model and the direct modeling method) are examined. Then, the overall insulation efficiency of the blade surface with a complete thermal barrier coating is analyzed based on the thin-wall thermal resistance model. Subsequently, the impact of different delamination factors on blade cooling effectiveness is explored. The research results indicate that compared to the direct modeling method, the thin-wall thermal resistance model has a simulation deviation of less than 7% and can effectively improve modeling and simulation efficiency while ensuring computational accuracy. The highest insulation efficiency of the thermal barrier coating is observed in the middle section of the blade’s back surface near the cold air inlet, reaching 8.3%. Under a constant delamination area, the shape of the localized delamination has a minor effect on blade cooling effectiveness. When more delamination occurs in areas with higher insulation efficiency, the impact on blade cooling effectiveness becomes more significant.
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