The Vaporization Behavior of a Fuel Drop on a Hot Surface.

摘要

The evaluation of a fuel drop on a hot surface was investigated for a variety of pure and commercial fuels under atmospheric ambient pressure. Four basic modes of drop evaporation were identified; the contact mode, vaporization mode, maximum evaporation rate mode, and spheroidal mode. High level of experimental reproducibility was achieved for the pure fuels and the experimental variables that influenced the reproducibility of the test results were successfully identified. The effect of fuel properties on drop evaporation lifetime in the various modes of evaporation was closely examined. Fuel properties that or controlled the temperature range within which the various modes of evaporation prevailed were determined. Evaporation curves were developed for the tested fuels using a wide selection of surface conditions, some of which resembled surface characteristics encountered in actual combustion applications. The effect of the evaporating surface characteristics on evaporation lifetime was also determined. The effect of fuel additives on the evaporation behavior of fuel drop deposited on a hot surface was evaluated.