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Effect of gas jet angle on primary breakup and droplet size applying coaxial gas-assisted atomizers

Wachter, Simon; Jakobs, Tobias ORCID iD icon; Kolb, Thomas

Abstract (englisch):

This study investigates the influence of gas jet angle on primary jet breakup and the resulting droplet size distribution for coaxial gas-assisted atomizers. In industrial applications, the gas jet of these atomizers are typically angled towards the liquid jet, whereas in most spray investigations in literature, parallel flow configurations are used. To enable a detailed analysis of the influence of the gas jet angle, three atomizers with angles of 0°, 15° and 30° were examined. Other geometric parameters, such as liquid jet diameter, gas gap width and wall thickness were kept constant. For each atomizer, two gas velocities at constant liquid mass flow were investigated i.e., two gas-to-liquid ratios (GLRs). An additional set of experiments was performed at increased system pressure using three atomizers with identical gas jet angles, but with an adapted gas orifice area in order to keep gas velocity, GLR and momentum flow ratio constant for all pressure levels. Water and a glycerol/water-mixture were applied in order to investigate the influence of liquid viscosity. The primary breakup process was monitored by a high-speed camera, whereas the resulting droplet size was detected using a phase-Doppler anemometer. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000136782
Veröffentlicht am 02.11.2021
DOI: 10.2218/iclass.2021.5808
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Engler-Bunte-Institut (EBI)
Institut für Technische Chemie (ITC)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2021
Sprache Englisch
Identifikator KITopen-ID: 1000136782
HGF-Programm 38.05.01 (POF IV, LK 01) Anthropogenic Carbon Cycle
Erschienen in ICLASS 2021, 15thTriennial International Conference on Liquid Atomization and Spray Systems, Edinburgh, UK, 29 Aug. -2 Sept. 2021. Vol: 1,1
Veranstaltung 15th Triennial International Conference on Liquid Atomization and Spray Systems (ICLASS 2021), Online, 30.08.2021 – 02.09.2021
Seiten Paper 31
Vorab online veröffentlicht am 30.08.2021
Schlagwörter Gas-assisted atomizer, angled gas jet, atomizer geometry, viscosity, system pressure
Nachgewiesen in Dimensions
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