Combined analyticalumerical solutions of a simplified model were conducted to study the influence of dissimilar droplet size distributions on the characteristics of multiple spray diffusion flames. Arrays of four laminar, polydisperse spray flames were considered. The sectional method was utilized to describe the spray of droplets and three different distributions having the same Sauter mean diameter (SMD) were investigated. The computed results show a strong coupling between the droplets distributions, evaporation coefficients and initial liquid mass fraction to the heights, shapes and types of flames formed. The results indicate the care that must be exercised in design and implementation of arrays of multiple sprays of liquid fuel droplets in combustion systems due to the wide range of deviations from desired burning conditions that may ensue due to disparate droplet size distributions.
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