Abstract
The atomization process and spray quality was studied for a prefilming airblast atomizer, using visualization techniques and phase-Doppler anemometry. All the tests were carried out at atmospheric pressure and using water. Results are presented and discussed for a liquid film thickness of 0.2mm, a liquid mass flow rate of 10.8 g/s, primary air velocity of 155 m/s and high swirl levels of the secondary air. The SMD is shown to be independent of liquid film velocity for coaxial swirling flows, providing the primary air velocity is kept above 120 m/s. The related drop size velocity distribution is shown to contribute to the optimization of combustion efficiency.
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