Basic Study on Heat Transfer and Flow Evaluation inside Gas Turbine Considering Change of Combustion Gas Composition

Abstract

In recent years, replacement of existing gas turbines with non-fossil fuels has been considered for the purpose of reducing CO2 emissions. In this study, a method for evaluating gas turbine characteristics when the composition of the combustion gas is varied is investigated by numerical analysis. The results of the performance evaluation based on a combination of flow coupled analysis including heat transfer in the blade solids and heat balance, as well as blade temperature evaluation, are reported. While detailed performance prediction for the entire turbine became possible, issues related to the evaluation of the effects of turbulence and radiation on the prediction of blade cooling efficiency were clarified.