Fluent provides accurate modeling tools for pulverized coal combustion. In this example FLUENT was validated for a swirled unstaged single burner through comparison with experimental data. Devolatilisation, char combustion, radiation and NOx models have been included in the analysis and predictions of velocity, temperature, species and pollutant were in good agreement with the in-flame measurements. Modeling results such as these can help engineers to design high efficiency and low emissions burners and furnaces.

The contours of static temperature in the periodic plane are shown. High temperature contours (in red) indicate the flame region. The predicted temperatures are in good agreement with the experimental values.

The prediction of tangential velocity as a function of radius at an axial station 0.85 m downstream of the inlet is shown in blue. This shows very good agreement with the experimental data (red), particularly in the high swirl region near the center of the furnace.

The prediction of volume percentage of carbon dioxide (with water content removed) along the combustor centerline is shown in blue. The axial dependence compares well with the data (red) except at the combustor inlet, where FLUENT underpredicts the value.

A radial profile of the NOx prediction at an axial station 0.85 m downstream of the inlet is shown. The FLUENT results (blue) are within 30% of the experimental values (red), with much closer agreement throughout most of the span of the data. This agreement is considered good for NOx calculations.