Comparison of breakup models in simulation of spray development in direct injection SI engine

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

Abstrakty

EN

Nowadays the wide range of spark ignition (SI) engines with spray guided direct injection (SGDI) is in production. Spray development is playing a major role in advanced engine design with three-dimensional computational fluid dynamics (CFD). Nevertheless still there is a need for improvement in CFD injection simulations because of the high pressure injection. The high pressure injection influences the drop breakup, coalescence and evaporation which are critical 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, mechanisms of breakup are still not well understood. To obtain better understanding of breakup models simulations have been performed for the engine combustion chamber with inlet andoutlet system and SGDI strategy. For that the model was at first constructed and then imported to the Fire code. After meshing process the model has 2 million cells. The engine is not boosted and as fuel the ethanol is used. The calculations were performedfor 3500 rpm. The influence of different breakup regimes on the spray shape is presented in this study. Comparison is made for Wave, TAB (Taylor Analogy Breakup) and Reitz-Diwkar breakup models.

Słowa kluczowe

EN

direct injection; combustion; gasoline; breakup models; SGDI

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2010
• Tom: Vol. 17, No. 4
• Strony: 123--130
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Ćwikowski P.

autor

Jaworski P.

autor

Teodorczyk A.

• Warsaw University of Technology, Institute of Heat Engineering Nowowiejska Street 21/25, 00-665 Warsaw teł:[phone]fax:[phone],

Bibliografia

• [1] Das, S., Chang, S.-I., Kirwan, J., Spray Pattern Recognition for Multi-Hole Gasoline Direct Injectors Using CFD Modeling, SAE Paper 2009-01-1488, 2009.
• [2] Drake, M. C., Haworth, D. C., Advanced gasoline engine development using optical diagnostics and numerical modeling, Proceedings of the Combustion Institute 31 99–124, 2007.
• [3] Wojdas, O., Numercial Simulations for Diesel engines, Ph.D. Thesis Insa Lyon 2009
• [4] AVL Fire CFD Solver v8.5.1 – Spray modeling manual.