Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
Atomization and Sprays
Fator do impacto: 1.737 FI de cinco anos: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 2.2

ISSN Imprimir: 1044-5110
ISSN On-line: 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.v8.i5.10
pages 479-502

EFFECT OF PIEZOELECTRIC TRANSDUCER MODULATION ON LIQUID SHEET DISINTEGRATION

I-Ping Chung
Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland, U.S.A.
Cary Presser
NIST
John L. Dressler
Fluid Jet Associates, Dayton, Ohio, U.S.A.

RESUMO

A stroboscope photographic technique was used to investigate the mechanism associated with the disintegration of a conical liquid sheet that is modulated by a piezoelectric driver. The effects of fluid viscosity, driving frequency, and input perturbation power were characterized with respect to the sheet breakup length. The experimental results indicate that the breakup length decreases with increasing input modulation power only at resonant frequencies. This effect is attributed to waves imposed along the liquid sheet surface that amplify wave-mode and rim-mode disintegration, and assist in liquid sheet breakup. The wavelength generated by the modulation was found to depend on the driving frequency and fluid density. The resonant driving frequency is affected slightly by the fluid density. For our experimental arrangement, an optimum driving frequency, for which the liquid breakup length is a minimum, was found to occur at about 10 kHz. Increasing the liquid viscosity impedes the spray development and lengthens the sheet disintegration. Modulation enhances the disintegration of lower-viscosity fluids but is less effective for higher-viscosity fluids. Higher input modulation power enhances disintegration. The relationship between the breakup length and the modulation power is consistent with the analytical solution suggested by Clark and Dombrowski [1] for breakup of an inviscid two-dimensional flat sheet.


Articles with similar content:

THE BREAKUP ZONE OF A DIESEL SPRAY: PART 1, LENGTH OF ZONE AND VOLUME OF UNATOMIZED LIQUID
Atomization and Sprays, Vol.5, 1995, issue 2
D. G. Salters, Andrew J. Yule
ABSOLUTE AND CONVECTIVE INSTABILITY OF CYLINDRICAL LIQUID JETS IN CO-FLOWING GAS STREAMS
Atomization and Sprays, Vol.8, 1998, issue 1
Xianguo Li, Jihua Shen
GROWTH OF LONGITUDINAL WAVES IN PLANE LIQUID SHEETS HAVING LATERAL WAVE MODES WHEN EXPOSED TO TWO GAS STREAMS OF UNEQUAL VELOCITIES
Atomization and Sprays, Vol.15, 2005, issue 2
T. John Tharakan, K. Ramamurthi
ANALYSIS OF NONPARALLEL FLOW EFFECTS ON THE INSTABILITY OF A CAPILLARY JET IN ANOTHER IMMISCIBLE FLUID
ICHMT DIGITAL LIBRARY ONLINE, Vol.5, 1997, issue
Lounes Tadrist, St. Radev
OPTICAL ANALYSIS OF THE MIXING EFFECT IN FULLY DEVELOPED LIKE-DOUBLET IMPINGING JET SPRAYS
Atomization and Sprays, Vol.22, 2012, issue 5
Berlin Huang, Tony Yuan