Table 4 Comparison between previous and current CAD model of NOx burner.

From: Machine learning assisted CFD optimization of fuel-staging natural gas burners for enhanced combustion efficiency and reduced NOx emissions

Component

Previous NOx burner

Optimal design

Outer chamber

Rectangular object

Cylindrical object

Inner chamber

Rectangular object

Cylindrical object

Burner cylinder

Cylinder

Cylinder

Burner top sphere

No spherical object placed in center

Spherical object placed in center

Fuel injection nozzles

Not there

Four cylinders on top of burner

Burner blast tubes

Four cylindrical tubes extending from fuel injection nozzles

Four cylindrical tubes extending from fuel injection nozzles

Support gas tube

No Cylindrical tube

Cylindrical tube

Flame stabilizing plate

Flat plane

Flat plane

Circular gas tube

Not there

Cylinder

Small NOx gas nozzles

Not there

Four small cylinders between circular gas tubes