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TECHNICAL PAPERS: Gas Turbines: Combustion and Fuels

Kinetics of Jet Fuel Combustion Over Extended Conditions: Experimental and Modeling

[+] Author and Article Information
Philippe Dagaut

C.N.R.S., Laboratoire de Combustion et Systèmes Réactifs, 1C, Avenue de la Recherche Scientifique, 45071 Orléans cedex 2, France

J. Eng. Gas Turbines Power 129(2), 394-403 (Feb 01, 2006) (10 pages) doi:10.1115/1.2364196 History: Received October 01, 2005; Revised February 01, 2006

The oxidation of kerosene (Jet-A1) has been studied experimentally in a jet-stirred reactor at 1 to 40atm and constant residence time, over the high temperature range 8001300K, and for variable equivalence ratio 0.5<φ<2. Concentration profiles of reactants, stable intermediates, and final products have been obtained by probe sampling followed by on-line and off-line GC analyses. The oxidation of kerosene in these conditions was modeled using a detailed kinetic reaction mechanism (209 species and 1673 reactions, most of them reversible). In the kinetic modeling, kerosene was represented by four surrogate model fuels: 100% n-decane, n-decane-n-propylbenzene (74%26%mole), n-decane-n-propylcyclohexane (74%26%mole), and n-decane-n-propylbenzene-n-propylcyclohexane (74%15%11%mole). The three-component model fuel was the most appropriate for simulating the JSR experiments. It was also successfully used to simulate the structure of a fuel-rich premixed kerosene-oxygen-nitrogen flame and ignition delays taken from the literature.

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Copyright © 2007 by American Society of Mechanical Engineers
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Figures

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Figure 1

The oxidation of n-decane under premixed flame conditions (1atm, 0.01074033g∕cm2∕s, initial mole fractions were 0.0319 for n-decane, 0.2857143 for oxygen, 0.6823857 for nitrogen). The data of (10) (symbols) are compared to the modeling (lines).

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Figure 2

The oxidation of kerosene in a JSR (700ppmv of kerosene, 11,550ppmv of oxygen, nitrogen diluent; 0.07s, 1atm). The data (large symbols) are compared to the modeling (lines and small symbols) using n-decane as a model fuel (770ppmv of n-decane, 11,550ppmv of oxygen).

Grahic Jump Location
Figure 3

The oxidation of kerosene in a JSR (700ppmv of kerosene, 11,550ppmv of oxygen, nitrogen diluent; 0.07s, 1atm). The data (large symbols) are compared to the modeling (lines and small symbols) using n-decane/n-propylbenzene as a model fuel (585ppmv of n-decane, 206ppmv of n-propyl-benzene, 11,550ppmv of oxygen).

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Figure 13

Ignition delay of kerosene/air mixtures at 1atm

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Figure 12

The oxidation of kerosene under premixed flame conditions (1atm, 0.010739794g∕cm2∕s, initial mole fractions: 0.0319 of kerosene, 0.28643 of oxygen). The data of (10) (symbols) are compared to the modeling (lines). The initial mole fractions used in the modeling were n-decane, 0.02463685; n-propylbenzene, 0.004993912; n-propylcyclohexane, 0.003662271, oxygen, 0.28643; nitrogen, 0.680276967).

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Figure 11

Reaction paths for kerosene oxidation drawn from the modeling using the selected three-component model fuel

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Figure 10

Oxidation of kerosene in a JSR at 40atm and t=2.0s (initial conditions: 250ppmv of kerosene TR0, 4125ppmv of O2, diluent nitrogen) (7). Comparison between experimental results (large symbols) and modeling (small symbols and lines) using n-decane/n-propylbenzene/n-propylcyclohexane as a model fuel (209ppmv of n-decane, 423ppmv of n-propylbenzene, 31ppmv of n-propylcyclohexane, 4128ppmv of oxygen).

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Figure 9

Oxidation of kerosene in a JSR (500ppmv of kerosene, 8250ppmv of oxygen, nitrogen diluent; 1.0s, 20atm) (7). The data (large symbols) are compared to the modeling (lines and small symbols) using n-decane/n-propylbenzene/n-propylcyclohexane as a model fuel (418ppmv of n-decane, 85ppmv of n-propylbenzene, 62ppmv of n-propylcyclohexane, 8250ppmv of oxygen).

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Figure 8

Oxidation of kerosene in a JSR at 10atm and t=0.5s (initial conditions: 1000ppmv of kerosene TR0, 16,500ppmv of O2, diluent nitrogen) (7). Comparison between experimental results (large symbols) and modeling (small symbols and lines) using n-decane/n-propylbenzene/n-propylcyclohexane as a model fuel (836ppmv of n-decane, 169ppmv of n-propylbenzene, 124ppmv of n-propylcyclohexane, 16,500ppmv of oxygen).

Grahic Jump Location
Figure 7

The oxidation of kerosene in a JSR (700ppmv of kerosene, 5775ppmv of oxygen, nitrogen diluent; 0.07s, 1atm). The data (large symbols) are compared to the modeling (lines and small symbols) using n-decane/n-propylbenzene/n-propylcyclohexane as a model fuel (585ppmv of n-decane, 119ppmv of n-propylbenzene, 87ppmv of n-propylcyclohexane, 11,550ppmv of oxygen).

Grahic Jump Location
Figure 6

The oxidation of kerosene in a JSR (700ppmv of kerosene, 23,100ppmv of oxygen, nitrogen diluent; 0.07s, 1atm). The data (large symbols) are compared to the modeling (lines and small symbols) using n-decane/n-propylbenzene/n-propylcyclohexane as a model fuel (585ppmv of n-decane, 119ppmv of n-propylbenzene, 87ppmv of n-propylcyclohexane, 11,550ppmv of oxygen).

Grahic Jump Location
Figure 5

The oxidation of kerosene in a JSR (700ppmv of kerosene, 11,550ppmv of oxygen, nitrogen diluent; 0.07s, 1atm). The data (large symbols) are compared to the modeling (lines and small symbols) using n-decane/n-propylbenzene/n-propylcyclohexane as a model fuel (585ppmv of n-decane, 119ppmv of n-propylbenzene, 87ppmv of n-propylcyclohexane, 11,550ppmv of oxygen).

Grahic Jump Location
Figure 4

The oxidation of kerosene in a JSR (700ppmv of kerosene, 11,550ppmv of oxygen, nitrogen diluent; 0.07s, 1atm). The data (large symbols) are compared to the modeling (lines and small symbols) using n-decane/n-propylcyclohexane as a model fuel (585ppmv of n-decane, 206ppmv of n-propylcyclohexane, 11,550ppmv of oxygen).

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