The burning characteristics of pure n-alkanes (n-octadecane and n-docosane) are investigated. Combustion of single and double droplets is studied experimentally, the histories of burning droplets are obtained, and the burning rate constants are determined. Flame transfer is studied in a two-droplet system. K e y w o r d s: n-docosane, n-octadecane, droplet, burning rate.

The paper presents a study of high-temperature heat and mass transfer and combustion kinetics of octadecane particle in room temperature air taking in consideration fuel heating, melting and evaporation. The consecutive stages of droplet combustion are described. Burning rate constants and flame heights are determined for droplets with different initial diameters

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The alkanes melting (n-Octadecane, n-Docosane) is studied experimentally. The droplets size and shape histories are analyzed and compared with the characteristics of n-alkanes phase transition solid-liquid. It is found that the droplet equivalent diameter increases significantly due to melting and thermal expansion. At the same time its shape evolves continuously: initially elongated droplet becomes almost spherical then elongates again. The droplet aspect ratio non-monotonic change correlates with surface tension temperature dependence.