An aerated (effervescent) injector is used to improve the atomization quality of the liquid fuel. The swirling oxidiser is provided coaxially to improve the flame stabilization and the combustion process.
A burner plate with multiple injectors will provide better fuel control and control over pollutant formation. High level throttling and wide burner operating ranges is possible with selective control over the different injectors
With increasing gas-to-liquid ratio (without coaxial swirl air)
Diagnostics: Shadowgraphy
With increasing momentum ratio (MR) between coaxial swirl air and two-phase liquid
Diagnostics: Shadowgraphy
Ref: Ajay Vincent Raj, M. Tech 2021 Thesis, "Experimental Investigation of Spray Characteristics in a Swirl Co-axial Aerated Injector", IIST.