Numerical Study of Ethanol Suspension Combustion in Air
A. A. Ponomarev1,2, D. K. Sharaborin1, M. Yu. Khrebtov1, R. I. Mullyadzhanov1,2, V. M. Dulin1,2
1Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
2Novosibirsk State University, Novosibirsk, 630090 Russia
Keywords: laminar cone flame, gas-droplet combustion, ethanol, finite volume method, OpenFOAM
Abstract
This paper describes a numerical simulation of a laminar flame of a premixed mixture of ethanol and air at atmospheric pressure with the addition of a suspension of ethanol droplets. The initial fuel-oxidizer ratio in the gas phase is ϕgas = 0.844 and 1.125. With account for the fuel in the liquid phase, the total equivalence ratio is ϕtot = 1.195 and 1.476, respectively. The calculation is performed using the method of direct numerical simulation with a reduced chemical mechanism. Motion, heating, and evaporation of droplets are determined using the Lagrange approximation. The numerical simulation results are verified using experimental data (flame cone photographs and laser-induced fluorescence data). It is revealed that all the droplets evaporate in the flame front heating region and the presence of fuel in the liquid phase significant increases the CO concentration both in the calculation and in the experiment.
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