Annulus Cold Film Flow Characteristics of Can Combustor with Liner Temperature Rising

Abstract

This paper focuses on the studying behavior of velocity profile with the influence of different temperatures for the inner and outer annulus of can combustor. An experimental rig was designed to simulate the flow inside the annulus of can combustor. An analytical CFD tool was designed and validated with experimental data. The can combustor tested in this study is a real part collected from Hilla/Iraq gas turbine power station. The velocity profiles are investigated in six stations in the annulus region. The axial velocity and turbulence intensity are calculating with a different temperature for inner and outer annulus. From The results, the increase in temperature leads to undesirable reversible flow and large recirculation zone. It is found that high turbulent intensity leads to destroy the cooling film. The increasing temperature would increase the turbulence intensity causing a recirculation region enlargement. The results also show that the high temperature, velocity profile and the jet of air through holes. The Computational results were compared against the experimental results, and they show a very good agreement.