Coupled study of the film and spray on a basic annular prefilming airblast atomizer

Valentin Gosselin (1) , Bernard Ferret (1) , Rudy Bazile (1)

1 IMFT - Institut de mécanique des fluides de Toulouse

One way to increase efficiency and reduce pollution in transport and energetic domain is designing fuel injectors with better atomization. In this work, experiments were performed on a prefilming airblast atomizer often used in gas turbine engines. For this purpose, a new injector was designed to visualize the prefilming zone and the primary atomization together. The flow configuration corresponds to an annular liquid film sheared by inner high velocity airflows. High speed Shadowgraphy was used to observe film and spray, liquid film frequency, wave velocity and wave deformation, primary breakup regime. Finally, a link between liquid film and the primary atomization are shown first qualitatively and after quantitatively.

Mots clés: Atomization; Liquid film; Annular geometry; Airblast; Prefilming

Domaines: Milieux fluides et réactifs; Mécanique des fluides [physics.class-ph]

Valentin Gosselin, Bernard Ferret, Rudy Bazile. Coupled study of the film and spray on a basic annular prefilming airblast atomizer. 28th European Conference on Liquid Atomization and Spray Systems (ILASS 2017), Sep 2017, Valence, Spain. ⟨10.4995/ILASS2017.2017.4626⟩. ⟨hal-02046494⟩