Abstract
The density-weighted Navier-Stokes equations with k-ε turbulence closure were applied in confined swirling turbulent reacting flows. Extensive comparisons were made with the benchmark test data. The cold boundary difficulty was tentatively suppressed by a temporary lowering of activation energy constant. The two-step reaction model of propane-air diffusion flame could approximate the flame zone. The chemical reaction time based on turbulence scale gave better agreements with the measured radical distribution than that on the mean flow did. The prediction capability of temperature fields was improved by the inclusion of radiative heat losses.
