Turbulent gas jets and diesel-like sprays in a crossflow: A study on axis deflection and air entrainment

• Published in: Fuel (Guildford) Vol. 85; no. 14; pp. 2120 - 2132
• Main Authors: Desantes, José M., Arrègle, Jean, López, J. Javier, García, José M.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.10.2006; Elsevier
• Subjects: Air entrainment; Applied sciences; Energy; Energy. Thermal use of fuels; Engines and turbines; Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc; Exact sciences and technology; Scaling laws; Spray in crossflow; Air entrainment; Spray in crossflow; Scaling laws; Scaling law; Combustion chamber; Diesel fuel; Diesel engine; Crossflow; Turbulent jet; Air jet; Direct injection
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2006.03.025

The interaction between a turbulent gas jet/diesel spray and a crossflow has been analysed. This phenomenon is a simplification of a more complex one that takes place in the combustion chamber of small direct injection diesel engines, and its study will help to better understand this more complex case. The two main aspects analysed here are axis deflection and air entrainment. It was found that both aspects are related to each other, and that the air/jet (or air/spray) momentum flux ratio is very relevant in the phenomenon. Scaling laws for the axis deflection of a jet/spray were obtained, and an original method to obtain fuel concentration along the axis of a jet/spray in a crossflow has been established. Gas jets and diesel sprays are found to be very similar even when they interact with a crossflow.