Effect of a Weak Electric Field on the Flame of a Bunsen Burner of Gaseous Hydrocarbons and Aerosol
A. V. Tupikin, V. M. Dulin, D. K. Sharaborin, A. G. Savitskii
Kutateladze Institute of Thermal Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: aerosol, laminar flame front, weak electric field, PIV system, PLIF system, laminar flame front propagation velocity, velocity field
Abstract
The results of a study examining the effect of a weak electric field on a Bunsen burner flame are presented, including the combustion of an aerosol consisting of water microdroplets in an air-methane mixture. Analysis of velocity fields obtained using a PIV system revealed changes in the laminar flame front propagation velocity when exposed to a weak electric field. Moreover, over a significant portion of the combustion front, the laminar front propagation velocity can be considered constant. The existence of an ion wind caused by the drift of negative charge carriers is confirmed. The introduction of water microdroplets into the fuel reduces the charge carrier concentration, indirectly evidenced by the fact that the effect of an electric field on combustion in this case leads to smaller changes in the flow structure ahead of the flame front.
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