Flame center, individual

The conception of a chain reaction in which the breaking off of the chains on the walls depends on the dimensions of the vessel or on the location of the point of ignition is untenable, since the chemical reaction in the propagation of a flame takes place in a narrow zone, the thickness of which is thousands of times less than the dimensions of the vessel and the reaction time of an individual volume element and even of the entire explosive mixture in the vessel is many times less than the time of diffusion of active centers to the walls of the vessel. 

In the dispersed mode, the droplet stream was aerodynamically dispersed to permit the sooting behavior of individual droplets to be investigated. The visual appearance of the flame produced was strikingly different from the nondispersed flame. Instead of a sheet of luminous radiation down the center of the burner, the... 

The maximum capacity of the individual circular burner ranges up to 300 x 10 Btu/h (316 X10 kJ/h). In circular burners the tangential doors built into the air register provide the turbulence necessary to mix the fuel and air and control flame shape. Although the fuel mixture as introduced to the burner is fairly dense in the center, the direction and velocity of the air, plus dispersion of the fuel, completely and thoroughly mix it with the combustion air. 

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