Investigation of Air Turbulence Intensity Effect on the Flame Structure in Different Flame Holder Geometry

In this paper, the effect of air turbulence intensity on the flame structure in various radii and lengths of a flame holder numerically studied. Finite volume method is used to solve the governing equations. Theobtained numerical results using realizable k-ε and β-PDF models show a good agreement with theexperimental data. The results show that the flame holders with greater lengths yield shorter flame lengths and higher flame temperature. Also, it is observed that by increasing flame holder radius, flame length slightly decreases at first, and then it increases. When holder radius increases, flame temperature increasesfirst and decreases thereafter. The results indicate that increasing air turbulence intensity results in considerable decrease in flame length, flame temperature, NO formation and temperature gradient in the flame zone

Keywords:

Flame Holder , Stabilization , Co-flowing Methane Flame , , Turbulence Diffusion FlameTurbulence Intensity , β-PDF Mode