Diesel Combustion Model with Auto-ignition Process of Non-homogeneous Mixture

Document Number: 2009-01-1897

Date Published: June 2009

Author(s):
Hiroshi Kawanabe - Kyoto Univ.
Takuji Ishiyama - Kyoto Univ.

Abstract:
Diesel combustion model for CFD simulation is established taking account of an auto-ignition process of non-homogeneous mixture. Authors revealed in their previous paper that the non-homogeneity of fuel-air mixture affected more on auto-ignition process such as its ignition delay or combustion duration than the turbulent mixing rate. Based on these results, novel diesel combustion model is proposed in this study. The transport calculation for local variation of fuel-air PDF is introduced and the chemical reaction rate is provided by the local non-homogeneity. Furthermore, this model is applied to the RANS-based CFD simulation of the spray combustion in a diesel engine condition. The results show that the combustion process is well described for several engine operations.

File Size: 1142K
Product Status: In Stock

See other papers presented at Powertrains, Fuels and Lubricants Meeting, June 2009, Florence, ITALY, Session: Multi-Dimensional Modeling (Part 2 of 2)

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