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Atomization and Sprays

Impact factor: 1.235

ISSN Print: 1044-5110
ISSN Online: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2016015807
pages 1197-1239

AN APPROACH TO MODELING FLASH-BOILING FUEL SPRAYS FOR DIRECT-INJECTION SPARK-IGNITION ENGINES

Christopher Price
Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
Arash Hamzehloo
Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
Pavlos Aleiferis
Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
David Richardson
Jaguar Land Rover, Coventry, CV3 4LF, United Kingdom

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 modeling flash-boiling fuel sprays using the Lagrangian particle tracking technique. An atomization model based on 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 phenomena such as spray collapse and droplet recirculation automatically, validated against experimental data.