Abstract
The effect of addition of high volatile fuel droplets to a lean mixture on a burning velocity, using an inverted cone burner, has been investigated. The used droplets are methanol-water, ethanol-water and soapbubbles enclosed propane-air or hydrogen-air mixtures. With these fuels, it is possible 1) to change the heat of combustion and the latent heat of fuel droplet without a significant change of droplet diameter, 2) to change the fuel vapour quantity around the droplet, and 3) to produce any concentration of gas cloud when the soapbubbles are used. The results obtained are follows : 1) The effect of addition of high volatile fuel droplets on the increase of burning velocity becomes large with an the increase of heat of combustion or a decrease of latent heat of the droplet ; 2) burning velocity increase when the soapbubble encloses a high burning velocity gas even if the latent heat of the soapsuds is greater than the heat of combustion ; and 3) the addition of droplets will increase the area of reacting zone of flame.
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