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Transient gas phase interaction effects during droplet-stream combustion

DOI: 10.1590/S1678-58782007000300014

Keywords: droplet vaporization, droplet combustion, interference effects, transient effects, numerical methods.

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Abstract:

gas-phase transient effects during the combustion of an infinite linear array of droplets are studied in the limit of infinite damk?ler number and in the absence of surrounding convective effects. the present study stems from the quantification of truncation-distance effects on the droplet mass vaporization rate, flame position and flame shape in quasi-steady numerical simulations. the solution domain is initially split into near and far-field subdomains. within each subdomain, analytical grid generation techniques are applied allowing the development of appropriate finite-difference expressions, the control of grid point distribution and the treatment of outflow boundary conditions. the interdroplet distance effect is studied and results for the droplet mass vaporization rate and flame behavior are presented. the results show the existence of different flame regimes ranging from isolated to merged flame conditions and similar vaporization rate evolution for different interdroplet distances.

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