Combustion Modeling for Modern Direct Injection Diesel Engines

Document Type: Research Note


1 Faculty of Mechanical Engineering, University of Urmia, Urmia, I.R. IRAN

2 Engineering Faculty, University of Tabriz, Tabriz,, I.R. IRAN


In order to comply with stringent pollutant emissions regulations, a detailed analysis of the engine combustion and emission is required. In this field, computational tools like CFD and engine cycle simulation play a fundamental role. Therefore, the goal of the present work is to simulate a high speed DI diesel engine and study the combustion and major diesel engine emissions with more details, by using the AVL-FIRE commercial CFD code. The predicted values of the in cylinder pressure,  heat release rate, emissions, spray penetration and in-cylinder isothermal contour plots by this code are compared with the corresponding experimental data in the literature and is derived good agreement. This agreement makes the model a reliable tool that can use for exploring new engine concepts.


[1] Carsten B., "Mixture Formation in Internal Combustion Engines", Springer publications, (2006).
[2] Tatschi R., Gabrief H.P., Priesching P., Fire-a Generic CFD Platform for DI Diesel Engine Mixture Formation and Combustion Simulation, User’s Group Meeting at the SAE Congress march 4, (2001).
[3] Beatrice C., Belardini P., Bertoli C., Cameretti M.C., Del Giacomo N., An Assessment of Predictivity of CFD Computations of Combustion and Pollutants Formation in D.I. Diesel Engines, SAE Paper NO. 962055, (1996).
[4] Jung, D., N. Assanis, D., Multi-Zone DI Diesel Spray Combustion Model for Cycle Simulation Studies of Engine Performance and Emissions, SAE Paper NO. 2001-01-1246; (2001).
[5] Taklanti A., Delhaye B., Multi-Dimensional Modeling of the Aerodynamic and Combustion in Diesel Engines, Oil & Gas Science and Technology – Rev. IFP, 54(2), p. 271 (1999).
[6] McCracken M.E., Abraham J., Swirl-Spray Interactions in a Diesel Engine, SAE Paper NO. 2001-01-0996, (2001).
[7] Cantore G., Carlo A., Montorsi L., Paltrinieri F., “Analysis of HSDI diesel Engine Intake System by Means of Multi-Diemensional Numerical Simulations: Influence of Non Uniform EGR Distribution” ASME, NO. ICES2006-1359; (2006).
[8] Takeda Y., Niimura K., Characteristics of Diesel Combustion and Emissions with a Multi-injector System, SAE Paper NO. 952511, (1995).
[9] "FIRE Engine Simulation Environment User Manual", V. 8.5; (2006).
[10] "AVL FIRE User Manual", V. 8.5; (2006).
[11] Payri F., Benajes J., Margot X., Gil A., CFD Modeling of the in-Cylinder Flow in Direct-Injection Diesel Engines, Computers & Fluids, 33, p. 995 (2004).
[12] Liu A.B., Reitz R.D., Modeling the Effects of Drop Drag and Break-Up on Fuel Sprays, SAE Paper NO. 930072, (1993).
[13] Dukowicz J.K., Quasi-steady Droplet Change in the Presence of Convection, Informal ReportLos AlamosScientific Laboratory. LA7997-MS.
[14] Naber J.D., Reitz R.D., Modeling Engine Spray/Wall Impingement, SAE Paper NO. 880107, (1988).
[15] Halstead M., Kirsch L., Quinn C. The Auto Ignition of Hydrocarbon Fueled at High Temperatures and Pressures - Fitting of a Mathematical Model, Combustion Flame, 30, p. 45 (1977).