Apell, Niklas ; Roisman, Ilia V. ; Tropea, Cameron ; Hussong, Jeanette (2022)
Modeling of the Characteristic Size of Drops in a Spray Produced by the Supersonic Gas Atomization Process.
ILASS–Europe 2022, 31th Conference on Liquid Atomization and Spray Systems. Virtual Event (6 - 8 Sept. 2022)
Konferenzveröffentlichung, Bibliographie

Kurzbeschreibung (Abstract)

Liquid atomization using supersonic gas flows is a common process in many industrial applications, one example being the atomization of liquid metals. In the present experimental and analytical work, a modeling approach for the characteristic size of drops in sprays produced by means of supersonic gas atomization has been developed. Local drop size distributions within the spray produced by a generic close-coupled atomizer operated with air have been obtained using the phase Doppler measurement technique. In order to investigate the importance of the liquid properties for the atomization process, water as well as two different aqueous glycerol solutions have been considered. No significant influence of the liquid dynamic viscosity on the drop size within the spray has been observed. Employing the chaotic disintegration theory, a characteristic length scale has been derived as a function of the deformation Weber number. The corresponding liquid deformation velocity has been estimated by describing the formation of a shock wave in the gas stream during the initial interaction of a liquid volume and a supersonic gas flow. Furthermore, a semi-empirical model based on the liquid Weber number has been proposed taking into account macroscopic effects at scales comparable to the size of the liquid jet. The correlation has been found to agree very well with the obtained experimental data.

Frage zum Eintrag

Redaktionelle Details anzeigen