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.

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The effect of intrapore reactions on the characteristics of high-temperature heat and mass transfer between porous carbon particles and air as a function of their temperature and diameter is analyzed in view of Stefan flow.

ELECTRIC FIELD INTERACTION WITH HYDROCARBON FLAMESThe problem of electric-field-assisted combustion for low-melting point hydrocarbons (paraffin wax, n-alkanes) attracts the attention of scientists in relation to the development of paraffinbased propellants. Our study is aimed at the detailed investigation of the dc electric field interaction with the flame of octadecane droplet. We have studied the melting and combustion of alkane particles in the electric field ranging from 33 kV/m to 117 kV/m. It is found that the melting rate decreases distinctly starting with the electric field strength ∼ 80 kV/m. This effect is more pronounced at high gas temperatures ( >1), when the melting time is about a few seconds. So, the melting process slows down in the dc electric field. At the same time, the burning rate constant rises by more than 10 percents. The obtained results can be used to develop efficient and clean technologies of fossil fuels combustion.K e y w o r d s: combustion, flame, alkanes, electric field.

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