Laminar burning velocity of nitromethane plus air flames: A comparison of flat and spherical flames

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Laminar burning velocity of nitromethane plus air flames: A comparison of flat and spherical flames. / Nauclér, Jenny; Heimdal Nilsson, Elna; Konnov, Alexander.

In: Combustion and Flame, Vol. 162, No. 10, 2015, p. 3803-3809.

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TY - JOUR

T1 - Laminar burning velocity of nitromethane plus air flames: A comparison of flat and spherical flames

AU - Nauclér, Jenny

AU - Heimdal Nilsson, Elna

AU - Konnov, Alexander

PY - 2015

Y1 - 2015

N2 - Laminar burning velocities, S-L, of nitromethane and air flames at 1 atm and initial gas temperatures, T, of 338 K, 348 K, and 358 K were determined using the heat flux method. Measurements were performed in non-stretched flames, stabilized on a perforated plate burner under adiabatic conditions. The comparison of these new experimental data and recent literature results obtained in spherical flames at 423 K was guided by the analysis of the temperature dependence of S-L using expression S-L = S-L0(T/T-0)(alpha), and also by kinetic modelling of premixed flames employing detailed mechanisms suggested in the literature. It was demonstrated that conventional recalculation of the flame front speed into the burning velocity using density ratio of the unburned and burned gases at equilibrium is inappropriate for spherical nitromethane flames. Both the laminar burning velocities and the power exponents, alpha, were compared with predictions of the kinetic mechanisms. Remaining discrepancies of the modelling and reconciled experimental data were highlighted. (C) 2015 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

AB - Laminar burning velocities, S-L, of nitromethane and air flames at 1 atm and initial gas temperatures, T, of 338 K, 348 K, and 358 K were determined using the heat flux method. Measurements were performed in non-stretched flames, stabilized on a perforated plate burner under adiabatic conditions. The comparison of these new experimental data and recent literature results obtained in spherical flames at 423 K was guided by the analysis of the temperature dependence of S-L using expression S-L = S-L0(T/T-0)(alpha), and also by kinetic modelling of premixed flames employing detailed mechanisms suggested in the literature. It was demonstrated that conventional recalculation of the flame front speed into the burning velocity using density ratio of the unburned and burned gases at equilibrium is inappropriate for spherical nitromethane flames. Both the laminar burning velocities and the power exponents, alpha, were compared with predictions of the kinetic mechanisms. Remaining discrepancies of the modelling and reconciled experimental data were highlighted. (C) 2015 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

KW - Laminar burning velocity

KW - Nitromethane

KW - Temperature dependence

KW - Modelling

U2 - 10.1016/j.combustflame.2015.07.017

DO - 10.1016/j.combustflame.2015.07.017

M3 - Article

VL - 162

SP - 3803

EP - 3809

JO - Combustion and Flame

JF - Combustion and Flame

SN - 0010-2180

IS - 10

ER -