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Combustion Characteristics of C5 Alcohols and a Skeletal Mechanism for Homogeneous Charge Compression Ignition Combustion Simulation
Version 2 2015-12-17, 10:47
Version 1 2015-11-13, 20:00
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posted on 2015-12-17, 10:47 authored by Sungwoo Park, Suk Ho Chung, Tianfeng Lu, S. Mani SarathyC5 alcohols are considered
alternative fuels because they emit
less greenhouse gases and fewer harmful pollutants. In this study,
the combustion characteristics of 2-methylbutanol (2-methyl-1-butanol)
and isopentanol (3-methyl-1-butanol) and their mixtures with primary
reference fuels (PRFs) were studied using a detailed chemical kinetic
model obtained from merging previously published mechanisms. Ignition
delay times of the C5 alcohol/air mixtures were compared
to PRFs at 20 and 40 atm. Reaction path analyses were conducted at
intermediate and high temperatures to identify the most influential
reactions controlling ignition of C5 alcohols. The direct
relation graph with expert knowledge methodology was used to eliminate
unimportant species and reactions in the detailed mechanism, and the
resulting skeletal mechanism was tested at various homogeneous charge
compression ignition (HCCI) engine combustion conditions. These simulations
were used to investigate the heat release characteristics of the methyl-substituted
C5 alcohols, and the results show relatively strong reactions
at intermediate temperatures prior to hot ignition. C5 alcohol
blending in PRF75 in HCCI combustion leads to a significant decrease
of low-temperature heat release (LTHR) and a delay of the main combustion.
The heat release features demonstrated by C5 alcohols can
be used to improve the design and operation of advanced engine technologies.
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results showIgnition delay timesLTHRengine technologies40 atmPRF 75charge compression ignitionHCCI combustionC 5 alcoholexpert knowledge methodologyReaction path analysesrelation graphHomogeneous Charge Compression Ignition Combustion SimulationC 5 alcoholscombustion Characteristicsheat release featuresSkeletal MechanismC 5 alcoholsengine combustion conditionscombustion characteristicsreference fuelsC 5 Alcoholsmechanismheat release characteristicsgreenhouse gasesalternative fuelsheat release
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