TY - JOUR

T1 - On nonadiabatic condensed phase combustion

AU - Kaper, Hans G.

AU - Leaf, Gary K.

AU - Margolis, Stephen B.

AU - Matkowsky, Bernard J.

N1 - Funding Information:
This work was supported by the Applied Mathematical Sciences Research Program, Office of Energy Research, U.S. Department of Energy.

PY - 1987/7/1

Y1 - 1987/7/1

N2 - We analyze the effects of melting and volumetric heat losses on the propagation of a reaction front in condensed phase combustion. Considering both homogeneous and heterogeneous models for the reaction rate, we calculate the propagation velocity for steady, planar burning as a function of the parameters in the problem. In particular, we show that this quantity is a multi-valued function of the heat loss parameter. We interpret the critical value of this parameter at which the propagation velocity has a vertical tangent, and which varies with the melting parameter, as an extinction limit beyond which a steady, planar combustion wave cannot sustain itself. We also present a model for nonsteady, nonplanar burning and consider the linear stability of the steady, planar solution. As in the adiabatic case, this basic solution is unstable to pulsating disturbances for sufficiently large values of a modified activation energy parameter. We show, in agreement with experimental results, that the effects of heat loss, as well as melting, are destabilizing in the sense that the neutral stability boundary becomes more accessible when these phenomena are taken into account.

AB - We analyze the effects of melting and volumetric heat losses on the propagation of a reaction front in condensed phase combustion. Considering both homogeneous and heterogeneous models for the reaction rate, we calculate the propagation velocity for steady, planar burning as a function of the parameters in the problem. In particular, we show that this quantity is a multi-valued function of the heat loss parameter. We interpret the critical value of this parameter at which the propagation velocity has a vertical tangent, and which varies with the melting parameter, as an extinction limit beyond which a steady, planar combustion wave cannot sustain itself. We also present a model for nonsteady, nonplanar burning and consider the linear stability of the steady, planar solution. As in the adiabatic case, this basic solution is unstable to pulsating disturbances for sufficiently large values of a modified activation energy parameter. We show, in agreement with experimental results, that the effects of heat loss, as well as melting, are destabilizing in the sense that the neutral stability boundary becomes more accessible when these phenomena are taken into account.

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U2 - 10.1080/00102208708947034

DO - 10.1080/00102208708947034

M3 - Article

AN - SCOPUS:0001105080

SN - 0010-2202

VL - 53

SP - 289

EP - 314

JO - Combustion science and technology

JF - Combustion science and technology

IS - 4-6

ER -