Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
Atomization and Sprays
IF: 1.737 5-Year IF: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 2.2

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

Volumes:
Volume 30, 2020 Volume 29, 2019 Volume 28, 2018 Volume 27, 2017 Volume 26, 2016 Volume 25, 2015 Volume 24, 2014 Volume 23, 2013 Volume 22, 2012 Volume 21, 2011 Volume 20, 2010 Volume 19, 2009 Volume 18, 2008 Volume 17, 2007 Volume 16, 2006 Volume 15, 2005 Volume 14, 2004 Volume 13, 2003 Volume 12, 2002 Volume 11, 2001 Volume 10, 2000 Volume 9, 1999 Volume 8, 1998 Volume 7, 1997 Volume 6, 1996 Volume 5, 1995 Volume 4, 1994 Volume 3, 1993 Volume 2, 1992 Volume 1, 1991

Atomization and Sprays

DOI: 10.1615/AtomizSpr.v11.i5.60
22 pages

PHYSICAL PROCESSES INFLUENCING EFFERVESCENT ATOMIZER PERFORMANCE IN THE SLUG AND ANNULAR FLOW REGIMES

Clive A. Catlin
Department of Chemical and Process Engineering, University of Sheffield, Sheffield, United Kingdom
Jim Swithenbank
Department of Chemical and Process Engineering, University of Sheffield, Sheffield, United Kingdom

ABSTRACT

Department of Chemical and Process Engineering, University of Sheffield, Sheffield, United Kingdom Effervescent atomizers made from Perspex with rectangular-cross-section mixing channels have enabled a high-speed video study of the interaction between the internal two-phase flow and the external atomization process. Droplet sizes were measured using a laser diffraction instrument. The gas is seen to vent at sonic velocity in bursts along the axis of an annular liquid jet. Theoretical analysis indicates that the annulus is eroded by the Kelvin-Helmholtz instability ultimately exciting sheet instabilities. The relative contributions of the two instabilities, combined with coalescence of the smaller droplets, is considered to determine the differences between the size distributions generated by circular and slot-shaped orifices. Instabilities have also been observed in the liquid film on the wall of the mixing channel which degrade atomization quality. A new correlation has been developed for the liquid discharge coefficient which extends previous work on bubbly flows to the slug and annular flow regimes.


Articles with similar content:

SPRAY FORMATION BY A ROTARY ATOMIZER OPERATING IN THE CORIOLIS-INDUCED STREAM-MODE INJECTION
Atomization and Sprays, Vol.29, 2019, issue 10
Sajjad Rezayat, Mohammad Farshchi
EXPERIMENTS ON ANNULAR LIQUID JET BREAKUP
Atomization and Sprays, Vol.11, 2001, issue 5
Jihua Shen
ROUND JET IN CROSS SHEAR FLOW
Visualization of Mechanical Processes: An International Online Journal, Vol.2, 2012, issue 4
Maria V. Litvinenko, Victor V. Kozlov, Grigory V. Kozlov, Yury A. Litvinenko, Genrich R. Grek
EFFECT OF ATOMIZER INTERNAL GEOMETRY ON THE INTERNAL AND EXTERNAL TWO-PHASE FLOW IN EFFERVESCENT ATOMIZATION
Atomization and Sprays, Vol.27, 2017, issue 2
Aly H. Gadallah, Kamran Siddiqui, Mona Hassanzadeh Jobehdar, Wajid A. Chishty
MECHANISMS, EXPERIMENT, AND THEORY OF LIQUID SHEET BREAKUP AND DROP SIZE FROM AGRICULTURAL NOZZLES
Atomization and Sprays, Vol.24, 2014, issue 8
Anthony Altieri, Steven Cryer, Lipi Acharya