Theoretical and Numerical Study on Thermal Insulation Performance of Thermal Barrier Coatings

In this article, a theoretical 1-D heat transfer model and conjugate numerical simulation was carried out to evaluate the thermal insulation of TBCs under different factors. The relationship temperature-drop between inner or outer surface barrier coating (TBC) investigated by simulation. effect TBC coupling internal external are obtained, which indicates that film cooling can both contribute an overall performance. addition, combination two results better than alone. However, weaken each other’s contribution Meanwhile, unlike cooling, change in coefficient basically does not affect coatings. Furthermore, sensitive analysis on levels coating’s conducted effectiveness, with blowing ratio ranging from 0.25 0.5, resistance 3 9, 5000 W/(m2∙K) 15,000 W/(m2∙K). reveal near exit hole, plays major role effectiveness. increase dimensionless distance, coatings effectiveness gradually increases, especially