An ignition delay and kinetic modeling study of methane, dimethyl ether, and their mixtures at high pressures
Ultan Burke,Kieran P. Somers,Peter O’Toole,Chis M. Zinner,Nicolas Marquet,Gilles Bourque,Eric L. Petersen,Wayne K. Metcalfe,Zeynep Serinyel,Henry J. Curran +9 more
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TL;DR: In this article, both experimental and chemical kinetic model-predicted ignition delay time data are provided covering a range of conditions relevant to gas turbine environments (T = 600-1600 K, p = 7-41 K, ϕ ǫ = 0.3, 0.5, 1.0, and 2.0 in ‘air’ mixtures).
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About: This article is published in Combustion and Flame. The article was published on 01 Feb 2015. and is currently open access. The article focuses on the topics: Ignition system & Flame speed.
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Figures
Table 3: CH4/DME mixture compositions (% molar volume) tested in the present study. 
Figure 11: Influence of equivalence ratio for 80/20 CH4/DME mixtures. – φ = 0.3, • – φ = 0.5, N – φ = 1.0, H – φ = 2.0. Open symbols are RCM data, filled symbols ST data. Lines are Mech 56.54 predictions. 
Figure 12: Sensitivity analyses for ignition delay times at p = 10 atm and at – φ = 2.0, – φ = 1.0, – φ = 0.5. 
Table 5: Low-temperature DME reactions treated as pressure dependent. CH3O . CH2 . CH3 + CH2O 
Figure 7: Influence of equivalence ratio on CH4 mixtures at – φ = 0.3, • – φ = 0.5, N – φ = 1.0, H – φ = 2.0. Open symbols are RCM data, filled symbols ST data, half-filled symbols are tailored-interface ST data. Lines are Mech 56.54 predictions. 
Figure 16: Sensitivity analysis at 827 K and φ = 0.50 at – 12.4 atm, – 24.7 atm.
Citations
Effect of Hydrogen Addition on Noncatalytic Partial Oxidation of Natural Gas with Oxygen in a Flow Reactor with Increased Calorific Intensity
TL;DR: In this paper, the effect of hydrogen addition on the partial oxidation of a natural gas/O2 mixture was studied in a flow reactor with increased calorific intensity, and it was shown that hydrogen addition at CH4/H2 = 3 positively influences the hydrogen production in partial oxidation.
6
Development and verification of simplified methane/dimethyl ether mechanism for micro-combustion
01 Feb 2022
TL;DR: In this paper , a simplified mechanism for simulating methane/dimethyl ether micro-flames is developed by validating the flame speed and ignition delay time, and this simplified mechanism is coupled with the existing pure methane mechanism (kee-58 mechanism) to obtain the blended fuel mechanism.
6
An improved low and high-temperature dimethyl ether kinetic model for the combustion atmospheres with high CO2 concentration
Lingfeng Dai,Lixin Lu,Chun Zou,Qi-Qing Lin,Wen Xia,Haiyang Shi,Ji’an Luo,Chao Peng,Shusen Wang +8 more
TL;DR: In this paper , a detailed kinetic model of DME was proposed based on the OXY-Aramco model, and validated by the low and high temperature IDTs, laminar flame speeds, and species profiles measured in this work.
6
Effects of wall temperature profile on weak flame structure of stoichiometric dimethyl ether/air mixture in a micro flow reactor
Shixuan Wang,Aiwu Fan +1 more
TL;DR: In this paper, the effects of wall temperature gradient and maximum wall temperature on flame structure were scrutinized in a cylindrical micro-channel with linear wall temperature profiles under an inlet velocity of 2.0 cm/s.
6
Exploration on laminar flame propagation of biogas and DME mixtures up to 10 atm: Insight into effects of DME co-firing, CO2 addition and pressure
TL;DR: In this paper , the effects of DME co-firing, CO2 addition and pressure on the laminar flame propagation of BG and DME mixtures were investigated with special attentions on the effects.
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