This paper presents the results of a study into the effect that liquid orifice orientation and scale have upon the drop-size performance of a plain-jet airblast atomizer featuring the injection of multiple liquid jets into a swirling airstream. Tests were conducted on water at near atmospheric pressure and temperature conditions using the well-established laser light scattering technique for spray quality measurements. The results presented in the paper reveal that the angular orientation of the liquid orifice, both in longitudinal and radial directions has a noticeable impact upon the atomization performance and exhibits scope for attaining further worthwhile reductions in drop-size relative to the multiple, transversely injected liquid jet configuration.

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