Numerical computations of turbulent swirling reacting flows using IDDES

Turbulent swirling reacting flows is computationally studied for high-Reynolds number flows, Re = 1.2x10⁶, using the improved delayed detached eddy simulation (IDDES). The goal of the present research is to understand the impact of the swirl number and thus, the effect of the swirling flow on the flow field and combustion efficiency. The study shows that the swirling flow enhances the mixing rate and the rate of production. Moreover, the swirling flow causes a preferential flow direction and thus, it affects the combustion inside the swirl combustor. Thus, high combustion temperature is observed in the region close to the combustor walls. An increase of temperature, with the increase of the production rate of the products, is also observed. An increase in turbulence kinetic energy is observed in the nearwall region.