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Flame Spread over a Liquid Fuel Film in an Oxygen-Enriched Environment

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Combustion, Explosion, and Shock Waves Aims and scope

Abstract

Flame spread over a thin film of various liquid fuels with an flash point below ambient temperature has been studied experimentally using thin copper and thick glass substrates in environments with different oxygen concentrations. It has been shown that with an increase in the oxygen concentration, the flame speed increases faster than the normal speed of the corresponding homogeneous stoichiometric mixture. When the proportion of oxygen in the mixture with nitrogen was changes from 0.21 (air) to 1, the flame speed changes from 0.02 to 2.4 m/s. At flame speeds above 0.3 m/s, the thermal thinness condition is not satisfied even for thin copper substrates. The flame speed ceases to depend on the substrate properties and the fuel layer thickness and becomes dependent only on the fuel properties. In this speed range, the flame speed increases linearly with increasing thermal effect of a unit volume of the stoichiometric mixture of fuel vapor with oxidizer and decreases with increasing difference between the temperature \(T_{st}\) of formation of the stoichiometric composition under equilibrium conditions and the ambient temperature \(T_{0}\).

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Authors and Affiliations

  1. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia

    I. G. Namyatov & A. A. Korzhavin

Authors
  1. I. G. Namyatov
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  2. A. A. Korzhavin
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Correspondence to A. A. Korzhavin.

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Translated from Fizika Goreniya i Vzryva, 2023, Vol. 59, No. 1, pp. 43-53. https://doi.org/10.15372/FGV20230104.

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Namyatov, I.G., Korzhavin, A.A. Flame Spread over a Liquid Fuel Film in an Oxygen-Enriched Environment. Combust Explos Shock Waves 59, 39–48 (2023). https://doi.org/10.1134/S0010508223010045

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