4.5 Article

Ignition delay times of methane/diethyl ether (DEE) blends measured in a rapid compression machine (RCM)

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ELSEVIER SCI LTD
DOI: 10.1016/j.jlp.2021.104430

关键词

Ignition delay times; Diethyl ether; DEE; Rapid compression machine; Methane

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  1. Deutsche Forschungsgemeinschaft [SCHI647/3-2]

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Diethyl ether (DEE) is studied for combustion applications both as a reference substance and a potential bio-fuel, with experiments conducted in a rapid compression machine (RCM) comparing auto-ignition behaviors under different conditions.
Diethyl ether (DEE) is an interesting species for combustion for at least two reasons: On the one hand, it is used as a kind of worst case reference substance for studies concerned with the prevention of accidental ignition events. On the other hand, it is also a candidate bio-fuel. For this reason, in this work, auto-ignition of two different CH4/DEE-mixtures (90/10 and 95/5 mol-% CH4/DEE) are studied in a rapid compression machine (RCM). In the RCM, the gas mixture is compressed in a piston-cylinder device up to 20 bar and held under isochoric conditions at top dead center. Auto-ignition occurs after an ignition delay time (IDT). IDTs are measured for compression temperatures ranging between 515 and 925 K, for both, stoichiometric and fuel-rich mixtures (equivalence ratio phi = 2). The experimental data are compared to results of simulations involving detailed chemistry, as well as to other fuels investigated in the same RCM (results from literature).

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