This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Modelling of Spray and In-cylinder Air Flow Interaction in Direct-Injection Engines
ISSN: 0148-7191, e-ISSN: 2688-3627
Published November 01, 2001 by The Automotive Research Association of India in India
Annotation ability available
Event: SIAT 2001
A model is developed based on Lagrangian-drop and Eulerian-fluid procedure to simulate fuel spray structure and the interaction of spray with in-cylinder gas motion. The hollow cone spray is modeled assuming the sheet consisting of blobs of droplets and these blobs are further subjected to secondary breakup. The droplet equations of position, momentum and temperature have been solved by the fourth order Runge-Kutta scheme. The gas phase compressible flow is solved using the finite volume method in conjunction with the SIMPLEC algorithm. The coupling between gas phase and the liquid phase has been achieved through the source terms arising in each phase. Three-dimensional spray and interaction with air motion inside the cylinder have been performed. The results show that the spray structure is well simulated. The model predicts the entrained air velocities and the fuel vapour concentration distribution as a function of time.
CitationAbani, N., Bakshi, S., and Ravikrishna, R., "Modelling of Spray and In-cylinder Air Flow Interaction in Direct-Injection Engines," SAE Technical Paper 2001-28-0071, 2001, https://doi.org/10.4271/2001-28-0071.
- Jost, K., Fuel Stratified Injection from VW, Automotive Engineering International, SAE, January 2001. This is another optional section.
- Gosman, A. D. and Johns, R. J. R., Computer Analysis of Fuel-Air Mixing in Direct Injection Engines, SAE Paper 800091, 1980.
- Reitz, R. D., Modeling Atomization Processes in High-Pressure Vaporizing sprays, Atomization and Spray Tech., 3, pp. 309-337, 1987.
- Hiroyasu, H. and Kadota. T, Fuel Droplet Size Distribution in Diesel Combustion Chamber, SAE Paper 740715, 1974.
- Abraham, J., and Magi, V., A Virtual Liquid Source (VLS) Model For Vaporizing Diesel Sprays. SAE Paper 1999-01-0911, 1999.
- Espey, C. and Dec. J., The Effect of TDC Temperature and Density on the liquid phase fuel penetration in a D.I.Diesel Engine, SAE Paper 952456, 1995.
- Dec, J., A conceptual model of DI diesel Combustion Based on Laser-Sheet Imaging. SAE paper 970873, 1997.
- Canaan, R. E., Dec, J., Green, R. M. and Daly, D. T., The Influence of Fuel Volatility on the Liquid Phase Fuel Penetration in a Heavy-Duty D.I. Diesel Engine. SAE Paper 980510, 1998.
- Han, Z., Fan, L. and Reitz, R. D., Multidimensional Modeling of Spray Atomization and Air-Fuel Mixing in a Direct-Injection Spark-Ignition Engine. SAE paper 970884, 1997.
- Ferziger, J. H. and Peric, M., “Computational methods for fluid dynamics”, Springer.
- Doormal, J. P. V., and Raithby, G. D., Enhancements of a SIMPLE method for predicting incompressible fluid flows, Numerical Heat Transfer, 7,pp.147-163, 1984.
- Clark, C. J., and Dombrowski, N., Aerodynamic Instability and Disintegration of Inviscid Liquid Sheets. Proc. Roy Soc. Lond. A, 329, 467, 1972.
- O'Rourke, P. J., and Amsden, A. A., The TAB Method for Numerical Calculation of Spray Droplet Breakup, SAE Paper 872089, 1987.
- Han, Z., Parrish, S. E., Farrell, P. V., and Reitz, R. D., Modeling Atomization Processes of Pressure-Swirl Hollow-Cone Fuel Sprays, Atomization and Sprays, 7. 663-684. 1997.
- Arcoumanis, C., Gavaises, M., and French, B., Effect of Fuel Injection Processes on the Structure of Diesel Sprays, SAE Paper 970799, 1997