Influence of breakup models on simulation results of mixture formation and combustion in direct injection spark ignition engine

• Autorzy: Jaworski P. , Ćwikowski P. , Teodorczyk A.
• Języki publikacji: EN

Abstrakty

EN

Nowadays the wide range of spark ignition (SI) engines with spray guided direct injection (SGDI) are in production. Spray development is playing a major role in advanced engine design with three-dimensional computational fluid dynamics (CFD). Nevertheless, there is still a need for improvement in CFD injection simulations because of high pressure injection. The high pressure influences the drop breakup, coalescence and evaporation, which are crucial for proper representation of simulated phenomenon. Computer codes, like FIRE, give a possibility to simulate the process of injection with various types of breakup models. In spite of the importance of atomization, the mechanisms of breakup are still not well understood. To obtain better understanding of breakup model s influence on combustion the simulations have been performed for the engine combustion chamber with inlet and outlet system and SGDI strategy. ECFM-3Z combustion model was used for ethanol fuel. Demonstration of the influence of different breakup regimes on the combustion processes is presented. Comparison was made for Wave, Tab (Taylor Analogy Breakup) and Reitz breakup models.

Słowa kluczowe

EN

combustion; SGDI

• Wydawca: Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archivum Combustionis
• Rocznik: 2011
• Tom: Vol. 31 nr 1-2
• Strony: 43--54
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Jaworski P.

autor

Ćwikowski P.

autor

Teodorczyk A.

• Warsaw University of Technology, Institute of Heat Engineering Warsaw, 00-665, Poland,

Bibliografia

• [l] Sudhakar Das, Shi-Ing Chang and John Kirwan. "Spray Pattern Recognition for Multi-Hole Gasoline Direct Injectors Using CFD Modeling" SAE Paper 2009-01-1488
• [2] M.C. Drake, D.C. Haworth. "Advanced gasoline engine development using optical diagnostics and numerical modeling" Proceedings of the Combustion Institute 31 (2007) 99-124
• [3] O. Wojdas. "Numercial Simulations for Diesel engines" Ph.D. Thesis Insa Lyon 2009
• [4] P. Jaworski, P. Prieshing, A. Teodorczyk, W. Bandel, 'Validation of the Numerical Simulation of Iso-octane auto-ignition delay time in rapid compression machine with use of ECFM-3Z Combustion model against experimental data", archivum combustionism vol. 30 - 2010 - No. 1-2, pp. l -14.
• [5] AVL Fire CFD Solver v8.5.1 - Spray modeling manual.
• [6] P. Priesching, G. Ramusch, J. Ruetz, R. Tatschl, "3D-CFD Modeling of Conventional and Alternative Diesel Combustion and Pollutant Formation - A Validation Study", SAE 2007-01-1907
• [7] Colin, O., Benkenida, A., "The 3-Zones Extended Coherent Flame Model (ECFM3Z) for Computing Premixed / Diffusion Combustion", Oil & Gas Science and Technology - Rev. IFP, Vol. 59 (2004), No. 6, pp. 593-609
• [8] AVL Fire CFD Solver v2009 - lCE Physics & Chemistry