Problem Description

The cylindrical combustor considered in this tutorial is shown in Figure  14.1. The flame considered is a turbulent diffusion flame. A small nozzle in the center of the combustor introduces methane at 80  ${\rm m/s}$. Ambient air enters the combustor coaxially at 0.5  ${\rm m/s}$. The overall equivalence ratio is approximately 0.76 (approximately 28 ${\rm\%}$ excess air). The high-speed methane jet initially expands with little interference from the outer wall, and entrains and mixes with the low-speed air. The Reynolds number based on the methane jet diameter is approximately $5.7 \times 10^3$.

Figure 14.1: Combustion of Methane Gas in a Turbulent Diffusion Flame Furnace