Methane/propane oxidation at high pressures: Experimental and detailed chemical kinetic modeling |
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Authors: | Eric L. Petersen Danielle M. Kalitan Gilles Bourque John M. Simmie |
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Affiliation: | a Mechanical, Materials and Aerospace Engineering, University of Central Florida, Orlando, FL 32816-2450, USA b Rolls-Royce Canada 9500 Côte-de-Liesse, Lachine, Province of Quebec, Que., Canada H8T 1A2 c Chemistry Department, National University of Ireland, Galway, Ireland |
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Abstract: | Shock tube experiments and chemical kinetic modeling were performed to further understand the ignition and oxidation kinetics of various methane-propane fuel blends at gas turbine pressures. Ignition delay times were obtained behind reflected shock waves for fuel mixtures consisting of CH4/C3H8 in ratios ranging from 90/10% to 60/40%. Equivalence ratios varied from lean (? = 0.5), through stoichiometric to rich (? = 3.0) at test pressures from 5.3 to 31.4 atm. These pressures and mixtures, in conjunction with test temperatures as low as 1042 K, cover a critical range of conditions relevant to practical turbines where few, if any, CH4/C3H8 prior data existed. A methane/propane oxidation mechanism was prepared to simulate the experimental results. It was found that the reactions involving CH3O˙, CH3O˙2, and ?H3 + O2/HO˙2 chemistry were very important in reproducing the correct kinetic behavior. |
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Keywords: | Ignition Methane Propane Shock tube Chemical kinetics Fuel blends High pressure |
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