Combustion Studies of Oil/Water Emulsions.
Final rept. 1 Aug 77-30 Sep 80,
NORTHWESTERN UNIV EVANSTON IL
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The fundamental combustion characteristics of wateroil emulsions are studied. It is identified that the combustion behavior primarily depend on 1 the relative volatilities and concentrations of water and oil, 2 the liquid-phase motion, and 3 the fact that water and oil do not mix. Based on these various theoretical models, descriptions of droplet combustion in sprays are formulated and subsequently verified experimentally. The potential of disruptive droplet combustion leading to enhanced atomization and mixing are explored. A possible mechanism which may be responsible for the fire-safety nature of wateroil emulsions is suggested and directions for further optimization of emulsion formulation based on this concept are identified. Diesel engine testings show significant reduction in soot emulsion without adverse effect in combustion efficiency by using emulsions with 10 to 20 percent water. Author
- Combustion and Ignition