Numerical Simulation of Film Cooling Over Flat Plate

Abstract

The commercial CFD Ansys Fluent program is used to explore the effect of film cooling across a flat plate. The coolant supply tube and the primary mixing zone are included in the computational domain. For blowing ratios of 0.33, 0.5, and 1.67, and a density ratio of 1.14, a tube L/D of 4 and injection angles of (30^o, 60^o, and 90^o) were used. Adiabatic film cooling effectiveness distributions for inline and staggered configurations were also established. The primary finding of this study was that the 30^o hole had higher efficacy values than the 60^o and 90^o holes when the blowing ratio was 0.33 and the length-to-diameter ratio was the same. A blowing ratio of 0.5 was found to be the most effective. The results reveal that increasing the blowing ratio has a negative impact on film cooling, with the injected coolant tending to lift off the wall at a blowing ratio of 1.67 due to an increase in the wall normal momentum. The numerical results are compared to experimental data in this section.