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This paper shows the results of n-octane two droplets combustion in DC electric field following our previous study. Fiber-supported two droplets are burned under microgravity in air at atmosphere pressure and room temperature. Droplets are arrayed in the directions of electric field with 10 mm distance between droplets and in this condition both flames are individual and have very little interaction between them without an electric field. The equivalent applied elctric field is around 0 to 120 kV/m. The results show that flames are principally deformed to cathode with electric field, however, luminous flame at anode-side end is observed for anode-side flame while blue flame is observed at anode-side end of cathode-side flame. In addition, the increase in burning rate constants for both flames are observed and the increase in burning rate constant for cathode-side flame is larger than that for anode-side flame. The increase in burning rate constant is consistent to information from flame intensities. For cathode-side flame, an analogy to droplet combustion in force convection is discussed in terms of flame deformation and burning rate constants and a relation between them shows good agreement to that under forced convection quantitatively. The increase for anode-side flame is also mentioned from flame deformations.

Effects of Direct Current Electric Field on Separated Flames in Two Droplets Combustion under Microgravity