A combustion model for IC engine combustion simulations with multi-component fuels

Journal Article · Sat Jan 15 00:00:00 EST 2011 · Combustion and Flame

DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2010.07.019· OSTI ID:21396160

Ra, Youngchul; Reitz, Rolf D ^[1]

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1. Engine Research Center, University of Wisconsin-Madison (United States)

Reduced chemical kinetic mechanisms for the oxidation of representative surrogate components of a typical multi-component automotive fuel have been developed and applied to model internal combustion engines. Starting from an existing reduced mechanism for primary reference fuel (PRF) oxidation, further improvement was made by including additional reactions and by optimizing reaction rate constants of selected reactions. Using a similar approach to that used to develop the reduced PRF mechanism, reduced mechanisms for the oxidation of n-tetradecane, toluene, cyclohexane, dimethyl ether (DME), ethanol, and methyl butanoate (MB) were built and combined with the PRF mechanism to form a multi-surrogate fuel chemistry (MultiChem) mechanism. The final version of the MultiChem mechanism consists of 113 species and 487 reactions. Validation of the present MultiChem mechanism was performed with ignition delay time measurements from shock tube tests and predictions by comprehensive mechanisms available in the literature. A combustion model was developed to simulate engine combustion with multi-component fuels using the present MultiChem mechanism, and the model was applied to simulate HCCI and DI engine combustion. The results show that the present multi-component combustion model gives reliable performance for combustion predictions, as well as computational efficiency improvements through the use of reduced mechanism for multi-dimensional CFD simulations. (author)

• OSTI ID: 21396160
• Journal Information: Combustion and Flame, Vol. 158, Issue 1; Other Information: Elsevier Ltd. All rights reserved; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
COMBUSTION
INTERNAL COMBUSTION ENGINES
AUTOMOTIVE FUELS
METHYL ETHER
CYCLOHEXANE
ETHANOL
TOLUENE
COMPUTERIZED SIMULATION
COMBUSTION KINETICS
IGNITION
VALIDATION
SHOCK TUBES
TIME DELAY
CHEMISTRY
EFFICIENCY
OPTIMIZATION
PERFORMANCE
SPRAYS
ALKANES
DIRECT INJECTION ENGINES
CARBOXYLIC ACID ESTERS
Multi-component fuels
Reduced mechanisms
Spray combustion