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Towards system pressure scaling of gas assisted coaxial burner nozzles – An empirical model

Wachter, Simon; Jakobs, Tobias; Kolb, Thomas

Abstract:
The present study investigates the influence of system pressure, gas velocity, and annular gas gap width on the resulting droplet size. Three external-mixing twin-fluid atomizers are operated at a constant liquid mass flow. The nozzle geometry is kept similar, except that the annular gas gap width is changed. At every system pressure level (1 – 21 bar), three different gas velocities were investigated by changing the gas mass flow. High-speed camera images are used for observation of primary breakup and discussed with regard to local measurements of droplet size performed by a phase Doppler anemometer. The gas momentum flux as well as the gas momentum flow were applied to describe the atomization process under varying operating conditions. Finally, an empirical model is derived, enabling the system pressure scaling of external-mixing twin-fluid atomizers for the range of gas momentum flow under investigation.


Verlagsausgabe §
DOI: 10.5445/IR/1000128286
Veröffentlicht am 11.01.2021
Originalveröffentlichung
DOI: 10.1016/j.jaecs.2020.100019
Dimensions
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technische Chemie (ITC)
Engler-Bunte-Institut (EBI)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 03.2021
Sprache Englisch
Identifikator ISSN: 2666-352X
KITopen-ID: 1000128286
HGF-Programm 38.05.01 (POF IV, LK 01) Anthropogenic Carbon Cycle
Erschienen in Applications in energy and combustion science
Verlag Elsevier B.V.
Band 5
Seiten Art.-Nr. 100019
Nachgewiesen in Dimensions
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