Smoke Reduction in Jet Engines Through Burner Design

Results of experimental testing show that smoke can be significantly reduced by increasing the amount of air admitted to the primary zone. However, the location of the air entry ports, manner of air injection, and fuel spray quality are critical factors. Significant changes in combustor stability, ignition, carbon deposition, and durability characteristics are affected by the alteration of the primary zone fuel and airflow pattern.

Extensive work has also been required to develop smoke measuring systems. A modified Von Brand Filtering Recorder has been selected as the standard measuring system.