이산화탄소를 이용한 가스터빈 블레이드 막냉각 특성 연구

Abstract

In order to cool the turbine blade under high temperature operating conditions, the film-cooling method is generally applied. In this study, CO2 was used as working fluid and it helped the operating system to prevent the loss of compressed air. The trapezoidal diffuser shape was adopted at the cross section of hole and the characteristics of heat flow with various working fluids were numerically studied. In particular, the different mixture ratios of CO2, such as various density ratios of 0.2, 0.8, and 1.0, respectively, were considered. Numerical results are graphically depicted with various conditions.