Abstract
This chapter discusses the fundamentals of oil combustion and the nature of the spray combustion of fuel oil. The atomization of fuel oils provides a convenient means of obtaining self-sustaining flames. The way in which the fuel spray and the combustion air are mixed is crucial in determining the way in which the overall combustion proceeds. When the fuel spray is premixed or initially well mixed with the combustion air, two cases of combustion can be identified, these are heterogeneous combustion and homogeneous combustion. In the case of heterogeneous combustion, the droplets burn either as individual droplets each with a surrounding flame or as droplets in a sea of flame. However, in either of the event, the system is essentially heterogeneous in that two phases are present. In homogeneous spray combustion, the droplets evaporate prior to their arrival in the flame zone and the flame front is supported essentially by fuel vapor and air.
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