It is possible to reduce pollutant emission such as soot, NO, SO, and CO by adding water to oil.
Experiments are carried out about single droplet which is the water in oil emulsion fuel in the atmospheric vessel. We observed the combustion characteristics of the emulsion droplet by means of taking high speed photographies and compared with the computation results from quasi-steady state assumption. Iso-octane and the gas oil are selected as fuel.
In the case of the water in iso-octane emulsion fuel, we arrive at the conclusion that quasi-steady theory predicts well the combustion phenomena of droplet suspended on quartz filament. In the state of initial and final period of combustion, experimental results are not consistent with theoretical results because of unsteady effect.
In the case of the water in gas oil emulsion fuel, so called micro-explosion occurrs.
The factors such as initial water content, water-micro droplet size and distribution, ambient pressure energy have influence upon the intensity of micro-explosion.
When initial water content, ambient pressure and initial ignition energy are increased, micro explosion occurrs more intensively.
