Experimental and Numerical Studies of Combustion of a Single n-Heptane Droplet

摘要

This paper reports experimental and numerical studies on combustion of a spherical droplet under normal temperature and pressure conditions. A transient numerical analysis has been carried out assuming spherical symmetry. Finite rate chemistry is used to model chemical processes. Experimental data and present model predictions are compared. The slope of the d~2 la w curve known as burning rate constant, Kb, remains almost constant. Experimental values of the burning rate under normal gra vity are greater than the model predictions. Both natural convection and radiation heat loss from the flame could be responsible for this discrepancy. Variations in droplet centre temperature, droplet surface temperature and flame temperature are also analyzed in detail. The structure of the droplet combustion flame indicates that thin flame approximation assumed by the asymptotic theories could be valid.