Evaporation and Combustion of Emulsified Fuel. Onset of Microexplosion.

Abstract

An experimental study has been carried out to investigate the onset of micro-explosion of emulsified fuel. Silicone oil and water emulsions contained in Pyrex glass capillaries were immersed in an oil bath after degasification. The waiting time for the onset of microexplosion was measured at atmospheric pressure in the temperature range of 423 K to 463 K. The results showed that the waiting time at constant temperature correlated with the Weibull distribution and that the shape parameter was unity. It was also found that the mean waiting time for the onset of microexplosion decreased exponentially with increasing liquid temperature. An empirical equation was proposed for the mean waiting time as a function of superheating of water emulsified. The probability density function of the onset of microexplosion during the unsteady heating period was predicted on the basis of this equation.