Identification of the Droplet Group Combustion Formation Region by the Flame Index Parameter in the Laminar Counterflow Spray

Authors

1 univercity tarbiat modares

2 Tarbiat Modares University

3 ARI

Abstract

A two-dimensional numerical simulation of the spray flame has been carried out in a smooth counterflow configuration, and the region of formation of droplets group combustion by the flame index parameter for strain rate, equivalence ratio and the diameter of different droplets. n-decane (C10H22) is used as a liquid spray fuel, and a one-step global reaction is employed for the combustion reaction model. Fuel droplets are randomly injected using an UDF code in the air inlet and the droplet motion is calculated by Lagrange method. According to the results, in the ratio of high ratios, high strain rates and large droplet diameters, The temperature of the flame center decreases due to the suppression of the chemical reactions resulting from the reduction of oxidizing fractionation, and the dominant flame regime in these states is diffusion. The external group combustion of droplets occurs in the upper and lower layers of flame, and combustion of the internal group occurs at the center of the flame.

Keywords

References

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Journal of Solid and Fluid Mechanics
Volume 11, Issue 1
March and April 2021
Pages 212-199

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