Computational fluid dynamics and experimental analysis of a coated stainless steel gas turbine blade.

Abstract

This work Aims to analyze, through computational fluid dynamics (Cfd) with the concept of conjugate heat transfer (Cht), the effect of the Thermal Barrier coating and the cooling systemon an Austenitic Stainless steel blade in order to Evaluate the Temperature Behavior of the Material. Although this Steel has a Lower cost compared to Super ALLOYS, it has Similar Properties, Such as the Thermal Expansion Coefficient, chemical Affinity and Melting point. this Evaluation used Ansys® Cfx Software ot Solve the Numerical Problem. the Systemis Validated by Comparing the computational Results to an Experiment. Gas Turbine Blades have a low weight and an Elevated cost. this cost came Mainly form both the Material used and the Sophisticated coating and cooling Method. Thermal Barrier Coatings Associated to a cooling System are Employed on gas Turbine Blades to Increase the Lifetime of the Blade and the gas Turbine Performance. the study Indicates that the Thermal Barrier coating and ahe cooling System were Efficient At Reducing the Temperature of the Metallic Substrate By 160°C. this can Indicated that Stainless steel Blades can be used in gas turbines where the Metallic Temperature limit was not be reached.