Combustion simulations of the fuels for advanced combustion engines in a homogeneous charge compression ignition engine

International Journal of Engine Research July 18, 2012
Combustion simulations of the fuels for advanced combustion engines in a homogeneous charge compression ignition engine
Anand Krishnasamy, Youngchul Ra (yra@wisc.edu ), Rolf D Reitz
Engine Research Center, University of Wisconsin-Madison, USA
Bruce Bunting
Fuels, Engines and Emissions Research Center, Oak Ridge National Laboratory, USA
Abstract
Researchers conducted numerical simulations of combustion for a homogeneous charge compression ignition engine operating on multi-component reference diesel fuels. They employed two surrogate representation methods to describe the nine fuels for advanced combustion engines.
The first method of surrogates, denoted as physical-surrogate components, was formulated to describe the fuel’s physical properties by matching its distillation profile, specific gravity, lower heating value, hydrogen-to-carbon ratio, and cetane index with measured data. The second method of surrogates, denoted as chemical-surrogate components, was introduced to represent the chemistry of the fuel components using a new group chemistry representation model. In the model, the fuel components in the physical-surrogate components and chemical-surrogate components are related through the classification of chemical structures of the components, i.e. the component in the physical-surrogate components are grouped based on their chemical classes and the chemistry of each group is calculated using a chemical kinetics mechanism (MultiChem) that represents the combustion characteristics of its chemical class.
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