WIT Press

Scalar Characteristics Of A Lean Premixed Turbulent V-shape Flame (air-butane)


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37 - 46




415 kb

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WIT Press


M. S. Boulahlib, S. Boukebbab, I. Amara & E. Ferkous


This paper proposes an experimental study of the scalar fields of a lean V shape premixed turbulent flame. The thermometry with the thermocouple numerically compensated was used for determining the thermal fields of a premixed butaneair V shape flame. The structure of both the inert and reactive jet was studied for a Reynolds number of 7000. Turbulence is generated by a perforated grid situated upstream. The main results of the thermal field in the V shape flame have showed more important results and a representative form of the inner structure of the flame was then obtained. The study is to determine how the turbulence and equivalence ratio can affect the temperature field, the flame height, the variable progress and therefore the combustion process. Keywords: experimental, thermocouple, compensated temperature, premixed combustion, butane, turbulence grid. 1 Introduction Knowledge of the flame structure can be improved by a better comprehension of the flow turbulence phenomena and combustion. So, it is necessary to understand the physical and chemical processes dominating within the combustion system. In most practical applications, premixed turbulent combustion takes place in the laminar flamelet regime. This combustion regime is characterized by the combustion mode in which all length scales of the turbulent structures in the reacting flow are larger than the flame thickness. In the flamelet regime, where one assumes a chemical reaction time lower than the turbulence time scale, the effects of the interaction between the phenomena of turbulence and combustion are represented at the same time by the


experimental, thermocouple, compensated temperature, premixed combustion, butane, turbulence grid.