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 oxygen enrichment on methane ignition
Touqeer Anwar Kashif,Mohammed Alabbad,Miguel Figueroa-Labastida,Obulesu Chatakonda,Jeffrey W. Kloosterman,Joshua Middaugh,S. Mani Sarathy,Aamir Farooq +7 more
TL;DR: Effect of oxygen enrichment on methane ignition: Experimental and numerical study. The study investigates the ignition delay times (IDTs) of methane/oxygen mixtures diluted in argon/nitrogen. The results provide valuable data for understanding the ignition behavior of oxygen-enriched mixtures and can be used to improve the accuracy of numerical models.
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Comprehensive Experimental and Simulation Study of the Ignition Delay Time Characteristics of Binary Blended Methane, Ethane, and Ethylene over a Wide Range of Temperature, Pressure, Equivalence Ratio, and Dilution
Mohammad T. Baigmohammadi,Vaibhav Patel,S. Nagaraja,Ajoy Ramalingam,Sergio Martinez,Snehasish Panigrahy,A. Abd El-Sabor Mohamed,Kieran P. Somers,Ultan Burke,Karl Alexander Heufer,Andrzej Pekalski,Henry J. Curran +11 more
TL;DR: The ignition delay time (IDT) characteristics of binary blends of methane, ethane, and ethylene are studied experimentally and computationally over a wide range of temperature, pressure, equivalence ratio, and dilution.
4
A Computational investigation of the potential for non-sooting fuels to enable ultra-low NOx and CO2 emissions
David D. Wickman,Sage L. Kokjohn +1 more
TL;DR: In this article, a combined 3D CFD and 1D cycle simulation approach was used to compare lean and stoichiometric DME fueled compression ignition engine concepts to a base heavy-duty diesel engine at the near rated power operating condition.
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A machine learning method to predict rate constants for various reactions in combustion kinetic models
Ning Li,Sanket Girhe,Mingzhi Zhang,Bingjie Chen,Yingjia Zhang,Shenghua Liu,Heinz Pitsch +6 more
TL;DR: A machine learning model to predict rate constants for combustion kinetic models accurately predicts rate constants based on reaction fingerprints generated from NLP techniques.
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A shock tube study of the ignition delay time of DME/ammonia mixtures: Effect of fuel blending from high temperatures to the NTC regime
Xue Jiang,Qiying Zhang,Xiyu Liu,Tianqi Zhang,Yingjia Zhang,Zuohua Huang,Fuquan Deng,Ningbo Zhao,Hongtao Zheng,Yingwen Yan +9 more
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TL;DR: This study investigates the effect of DME blending on ammonia ignition delay times from high temperatures to the NTC regime, developing a new chemical kinetic model that accurately predicts experimental data, including ignition delay times and specie profiles.
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