Price, C; Hamzehloo, A; Aleiferis, PG; Richardson, D; (2016) An Approach to Modelling Flash-Boiling Fuel Sprays for Direct-Injection Spark-Ignition Engines. Atomization and Sprays , 26 (12) pp. 1197-1239. 10.1615/AtomizSpr.2016015807.

Text Hamzehloo_AtomizSpr2016015807.pdf - Accepted Version Access restricted to UCL open access staff Download (1MB)

Abstract

Flash-boiling is a phenomenon which occurs when a liquid is discharged into an environment with an ambient pressure below the saturation pressure of the liquid. The present computational work provides an approach to modelling flash-boiling fuel sprays using the Lagrangian particle tracking technique. An atomization model based on heterogeneous nucleation inside the nozzle is implemented as a boundary condition at the nozzle exit and alongside a superheat evaporation model for the emerging spray droplets. The near-nozzle dense spray region of flash-boiling sprays is also investigated by consideration to the initial spray plume cone angle. The model was able to predict important flash-boiling phenomenon such as spray collapse and droplet recirculation automatically, validated against experimental data.

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