Shock tube measurement and simulation of DME/n-butane/air mixtures: Effect of blending in the NTC region

•New ignition delay data of DME/n-butane/air mixtures were provided.•Literature models were evaluated.•The influences of DME addition on n-butane ignition were interpreted in the NTC region. In this study, the ignition delay times of lean and stoichiometric DME/n-butane/air mixtures were measured be...

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Bibliographic Details
Published in:Fuel (Guildford) 2017-09, Vol.203, p.316-329
Main Authors: Jiang, Xue, Tian, Zemin, Zhang, Yingjia, Huang, Zuohua
Format: Article
Language:English
Subjects:
Binary fuel
Blending effects
Butane
Chemical kinetic
Computer simulation
Delay
DME
Ignition
Ignition delay time
Kinetics
Mathematical models
n-Butane
Shock waves
Simulation
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Summary:•New ignition delay data of DME/n-butane/air mixtures were provided.•Literature models were evaluated.•The influences of DME addition on n-butane ignition were interpreted in the NTC region. In this study, the ignition delay times of lean and stoichiometric DME/n-butane/air mixtures were measured behind reflected shock waves at pressures of 2 and 10atm, temperatures from 650 to 1400K. The performances of several chemical kinetic models were evaluated. Numerical simulation and chemical kinetic analysis were conducted in a broad temperature range and at various DME blending ratios to understand the interactions between DME and n-butane. It is found that DME addition can promote both the first-stage and overall ignition delay of n-butane in the NTC region.
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2017.04.121