Burning Rate in Impinging Jet Flames

Abstract

A method for evaluating burning velocity in premixed turbulent flames stabilized in divergent mean flows is quantitatively validated using numerical approximations of measured axial profiles of the mean combustion progress variable, mean and conditioned axial velocities, and axial turbulent scalar flux, obtained by four research groups from seven different flames each stabilized in an impinging jet. The method is further substantiated by analyzing the combustion progress variable balance equation that is yielded by the extended Zimont model of premixed turbulent combustion. The consistency of the model with the aforementioned experimental data is also demonstrated.

Dynamics of diffusion jet combustion in an ejection burner

“…Among practical combustion schemes for hydrocarbon fuels, along with catalytic and surface burning, the organization of diffusion and pre-mixed reactive gas jets is widespread. In technical applications, reactive diffusion jets are used: in the combustion chambers of heat and power boilers of various power classes; high-temperature technological process of heating, melting, drying and heat treatment of surfaces; associated gas combustion technologies in hydrocarbon fields; multi-flare burners of combustion chambers of condensing boilers of distributed energy [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. The diffusion mechanism of flame propagation underlies the formation of forest and man-made fires.…”