TY - JOUR
T1 - On the mixed-convective flame structure in the stagnation point of a fuel particle
AU - Fernandez-Pello, A. C.
AU - Law, C. K.
N1 - Funding Information:
The work of the first author (A.C.F-E) was supported by a Career Development Grant, Faculty Development Program, University of California, Berkeley. The work of the second author (C.K.L.) was supported by the Division of Basic Energy Sciences, Department of Energy, under Contract No. DE-AC02-77ER04433 and the Heat Transfer Program of the National Science Foundation under Grant No. CME-7820013.
PY - 1982
Y1 - 1982
N2 - An analysis is developed for the mixed, forced and free, convective gasfication, ignition, steady burning and extinction at the stagnation point of a condensed fuel particle. The analysis makes use of the boundary layer approximation to describe the gas flow, of the flamesheet approximation to analyze the fuel burning process, and of large activation energy asymptotics to study the ignition and extinction phenomena. A mixed-convection parameter is introduced in the formulation of the problem in such a way that the forced or free conditions are respectively recovered for zero value of the Grashof or Reynolds number. This unified formulation of the problem permits the derivation of general criteria for ignition and extinction, and the description of the gasification and burning processes when the fuel particle is subjected to convective flows of different nature and intensity. Explicit expressions are derived for the gasification and mass burning rates and for the critical Damköhler numbers for ignition and extinction.
AB - An analysis is developed for the mixed, forced and free, convective gasfication, ignition, steady burning and extinction at the stagnation point of a condensed fuel particle. The analysis makes use of the boundary layer approximation to describe the gas flow, of the flamesheet approximation to analyze the fuel burning process, and of large activation energy asymptotics to study the ignition and extinction phenomena. A mixed-convection parameter is introduced in the formulation of the problem in such a way that the forced or free conditions are respectively recovered for zero value of the Grashof or Reynolds number. This unified formulation of the problem permits the derivation of general criteria for ignition and extinction, and the description of the gasification and burning processes when the fuel particle is subjected to convective flows of different nature and intensity. Explicit expressions are derived for the gasification and mass burning rates and for the critical Damköhler numbers for ignition and extinction.
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U2 - 10.1016/S0082-0784(82)80280-4
DO - 10.1016/S0082-0784(82)80280-4
M3 - Article
AN - SCOPUS:0020260029
SN - 0082-0784
VL - 19
SP - 1037
EP - 1044
JO - Symposium (International) on Combustion
JF - Symposium (International) on Combustion
IS - 1
ER -