The Effect of Thermal Barrier Coating on the Thermal Performance of a Gas Turbine Blade

Due to the very high importance of gas turbines in electricity production and also its increasing development in the electricity industry, one of the essential methods to increase the efficiency of gas turbine blades is to add thermal barrier coating to their outer surface. These coatings improve the cooling of gas turbine blades, but they also have disadvantages, such as the roughness of their surface causing the separation of the hot fluid flow around the turbine blades. The rough surfaces of thermal barrier coatings should be used optimally and purposefully. In this research, using the commercial software of Fluent, this type of coating has been investigated and analyzed to find the most optimal possible mode for its use. The influence of surface parameters such as roughness, thickness, and material of thermal barrier coatings have been investigated. The most optimal state for the mentioned parameters is 0.1 mm, 0.38 mm, and 2.7 W/m.K, respectively.