Abo Bibliothek: Guest
Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen
Atomization and Sprays
Impact-faktor: 1.189 5-jähriger Impact-Faktor: 1.596 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Druckformat: 1044-5110
ISSN Online: 1936-2684

Volumen 28, 2018 Volumen 27, 2017 Volumen 26, 2016 Volumen 25, 2015 Volumen 24, 2014 Volumen 23, 2013 Volumen 22, 2012 Volumen 21, 2011 Volumen 20, 2010 Volumen 19, 2009 Volumen 18, 2008 Volumen 17, 2007 Volumen 16, 2006 Volumen 15, 2005 Volumen 14, 2004 Volumen 13, 2003 Volumen 12, 2002 Volumen 11, 2001 Volumen 10, 2000 Volumen 9, 1999 Volumen 8, 1998 Volumen 7, 1997 Volumen 6, 1996 Volumen 5, 1995 Volumen 4, 1994 Volumen 3, 1993 Volumen 2, 1992 Volumen 1, 1991

Atomization and Sprays

DOI: 10.1615/AtomizSpr.2012005718
pages 561-579


Inchul Lee
Department of Aerospace and Mechanical Engineering, Graduate School of Korea Aerospace University, Korea
Dohun Kim
Department of Aerospace and Mechanical Engineering, Graduate School of Korea Aerospace University, Korea
Jaye Koo
School of Aerospace and Mechanical Engineering, Korea Aerospace University, Goyang, Gyeonggi, 412-791, Republic of Korea


In spray painting and coating industries, air-blast injectors configured with a liquid-centered and two-stage gas nozzle have many advantages, including low paint bounce-back and high transfer efficiency. Experimental investigations are used to study overspray characteristics and transfer efficiency. To verify the effect of the gas jets, air-blast injectors with a gas post of two stages are designed to analyze the overall spray characteristics as well as to increase the transfer efficiency. The experimental results show that the liquid jet breakup is governed by the gas jets of the inner stage In the case of the inner stage gas injection mode, better atomization qualities can be achieved. However, in the case of the outer stage gas injection mode, larger droplet distributions appeared at the same measurement point. As the momentum ratio of the gas jets increased, the droplet sizes decreased. Additionally, the gas jets of the outer stage also contributed to the atomization at the far-field spray region, and it also contributed to the droplet transportation to the object. It was observed that, as the velocity of the gas jets increased, the mean drop diameters decreased and the transfer efficiency increased due to the outer gas post which caused an air curtain to surround the spray jets so that an impinged droplet could not overspray to the outer region of the spray jets.