PREDICTIONS OF ADIABATIC FILM COOLING EFFECTIVENESS FOR EFFUSION FILM COOLING

Abstract

This paper investigates innovative cooling techniques for gas turbine combustor walls, crucial for maintaining durability and functionality in high-temperature conditions. Focusing on the combustor liner, the study examines the progression from traditional cooling methods such as louver and splash cooling to advanced techniques like transpiration cooling, which significantly reduces cooling air requirements by up to 50%. Using Computational Fluid Dynamics (CFD) analysis, the research evaluates convection cooling in ducts with 5 mm and 10 mm gap configurations, testing various inlet velocities. The results demonstrate that the narrower 5 mm gap offers a slightly higher cooling efficiency, achieving approximately 70% optimal cooling effectiveness. The study underscores the effectiveness of (CFD) in predicting temperature distributions and optimizing turbine design.