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Modelling of Two–Phase Direct Cylinder Injection
Technical Paper
2000-01-1393
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
As the world enters a new millennium, the spark ignition engine enters a new age of gasoline fuel injection technology – direct injection. Orbital Engine Company is at the forefront of this technology with a unique, air–assist direct injection (ADI) system, which utilises a low–pressure air pulse as fuel atomiser and carrier. Modelling of Orbital's ADI system was carried out using a Eulerian–Lagrangian formulation for two–phase flow with a commercially available CFD package called Star–CD. The research has been a large step forward towards an improved predictive injection model for use in engine development.
A simple model for simulating spray parameters was developed. This model involved the specification of initial airflow and droplet conditions, as initial results indicated that spray characteristics are strongly dependent on these initial conditions. Accurate specification of initial droplet size distributions was also determined to be necessary. The study demonstrates the high practical potential of two–phase modelling of Orbital's ADI system. The final model accurately simulates spray parameters over a fairly wide range of injection conditions.
Authors
Citation
de Vos, P., "Modelling of Two–Phase Direct Cylinder Injection," SAE Technical Paper 2000-01-1393, 2000, https://doi.org/10.4271/2000-01-1393.Also In
References
- Faeth G.M. 1983 Evaporation and combustion of sprays Progress in Energy and Combustion Science 9 1 76
- Kikuta K. & others 1997 Development of continuous spray model for diesel combustion simulation Asia–Pacific Conference on Combustion May 12–15 217
- Star–CD Manuals 1998 Manuals – Methodology Computational Dynamics Limited
- Wigley, G. & others 1999 The Role of Optical Diagnostics in the Design and Development of Gasoline Direction Injection Engines Loughborough University and Lotus Engineering Engineering Faculty
- de Vos, P.R. 1999 PDPA Experimental Data Processing – the 69X–065 injector Orbital Engine Company Internal Report June 1999