Investigation of HCCI combustion of diethyl ether and ethanol mixtures using carbon 14 tracing and numerical simulations

Despite the rapid combustion typically experienced in homogeneous charge compression ignition (HCCI), components in fuel mixtures do not ignite in unison or burn equally. In our experiments and modeling of blends of diethyl ether (DEE) and ethanol (EtOH), the DEE led combustion and proceeded further...

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Bibliographic Details
Published inProceedings of the Combustion Institute Vol. 30; no. 2; pp. 2693 - 2700
Main Authors Mack, J.H., Flowers, D.L., Buchholz, B.A., Dibble, R.W.
Format Journal Article Conference Proceeding
LanguageEnglish
Published United States Elsevier Inc 01.01.2005
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Summary:Despite the rapid combustion typically experienced in homogeneous charge compression ignition (HCCI), components in fuel mixtures do not ignite in unison or burn equally. In our experiments and modeling of blends of diethyl ether (DEE) and ethanol (EtOH), the DEE led combustion and proceeded further toward completion, as indicated by 14C isotope tracing. A numerical model of HCCI combustion of DEE and EtOH mixtures supports the isotopic findings. Although both approaches lacked information on incompletely combusted intermediates plentiful in HCCI emissions, the numerical model and 14C tracing data agreed within the limitations of the single zone model. Despite the fact that DEE is more reactive than EtOH in HCCI engines, they are sufficiently similar that we did not observe a large elongation of energy release or significant reduction in inlet temperature required for light-off, both desired effects for the combustion event. This finding suggests that, in general, HCCI combustion of fuel blends may have preferential combustion of some of the blend components.
Bibliography:ObjectType-Article-2
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content type line 23
UCRL-PROC-201918
USDOE
W-7405-ENG-48
ISSN:1540-7489
1873-2704
DOI:10.1016/j.proci.2004.08.136