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Perturbations of the flame structure due to a thermocouple. II. Modeling
P. A. Skovorodkoa, A. G. Tereshchenkob, A. A. Paletskyb, D. A. Knyaz'kovb, O. P. Korobeinichevb a Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
b Institute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
Abstract:
Flame perturbations caused by the presence of a thermocouple have been studied by modeling the external flow of a reactive gas mixture around a thermocouple using the complete system of unsteady Navier–Stokes equations modified to approximately account for the effect of heat release due to chemical reactions. The modeling was performed for a methane gas flame and for the flame of a condensed system exemplified by RDX under the experimental conditions described in the literature. It is found that the deceleration of the flow in the vicinity of the thermocouple leads to a local increase of heat due to chemical reactions and the corresponding increase in temperature relative to the thermocouple unperturbed value. This effect has not been previously discussed in the literature.
Keywords:
flame structure, thermocouple, Navier–Stokes equations, temperature, overheating, methane, RDX.
Received: 30.06.2010
Citation:
P. A. Skovorodko, A. G. Tereshchenko, A. A. Paletsky, D. A. Knyaz'kov, O. P. Korobeinichev, “Perturbations of the flame structure due to a thermocouple. II. Modeling”, Fizika Goreniya i Vzryva, 47:4 (2011), 46–58; Combustion, Explosion and Shock Waves, 47:4 (2011), 414–425
Linking options:
https://www.mathnet.ru/eng/fgv1110 https://www.mathnet.ru/eng/fgv/v47/i4/p46
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