The influence of ambient pressure and temperature on the evaporation rates of fuel drops is examined analytically. A numerical procedure for calculating steady-state values of drop-surface temperature and evaporation constant is described. The method is used to determine the droplet evaporation characteristics of nheptane, aviation gasoline, JP 4, JP 5, and diesel oil (DF 2) in quiescent atmospheres. Good agreement is demonstrated between calculated values of evaporation constant and corresponding published experimental results. It is shown that the pressure dependence of evaporation rates is stronger at high pressures than at low pressures. For high ambient temperatures the pressure dependence is positive; for low ambient temperatures it is negative.
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Chin et al. (1983) studied this question.
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