In this paper research is focused on the inner operation of prefilming airblast atomizers and its effect on liquid atomization. Liquid wavy film thickness and wavelength-frequency spectra, which characterize the liquid motion inside the atomizers, are measured with specifical techniques. The motion and separation of liquid wavy film are picturized by means of laser pulse micrography technique. The spray is measured with the Malvern Particle Sizer. The experiments show the liquid atomization is initiated by separation of the liquid film waves from their main film. The atomization characteristics are dominated by the extent of air/liquid interaction inside the atomizers. In addition, liquid flow rate effect on atomization is comfirmed. No liquid collection near the atomizer edges is found.

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