Abstract
Both the droplets and continuous phase (gas in the presence of the droplets) downstream of a 3x model combustor dome swirl cup are characterized in the absence of reaction. Continuous-phase and droplet velocities as well as droplet size were measured using phase Doppler interferometry. The measurements reveal that: (1) at the exit plane of the swirl cup assembly, more uniform and finer droplets are produced relative to the atomizer alone; (2) both the continuous phase and the droplets recirculate; (3) the location at which droplets join the recirculation is correlated with droplet size; and (4) significant slip velocities between the continuous phase and the droplets reflect a strong momentum exchange between the phases. 12 refs.
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