ライブラリ登録: Guest
Begell Digital Portal Begellデジタルライブラリー 電子書籍 ジャーナル 参考文献と会報 リサーチ集
Atomization and Sprays
インパクトファクター: 1.262 5年インパクトファクター: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN 印刷: 1044-5110
ISSN オンライン: 1936-2684

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

Atomization and Sprays

DOI: 10.1615/AtomizSpr.2015010618
pages 425-452

UNCERTAINTY QUANTIFICATION FOR LIQUID PENETRATION OF EVAPORATING SPRAYS AT DIESEL-LIKE CONDITIONS

Lyle M. Pickett
Combustion Research Facility, Sandia National Laboratories, P.O. Box 696, Livermore, CA 94551
Caroline L. Genzale
G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0001 USA
Julien Manin
Sandia National Laboratories, PO Box 969, MS9053, Livermore, CA 94551, USA

要約

Seeking to quantify the liquid volume fraction at the measured liquid penetration length for more forthright comparison to CFD results, we compared 10 different light-scatter and extinction diagnostics for measurement of the "liquid length" of an evaporating diesel spray. Results show that light-scatter imaging is sensitive to the orientation of the illumination source, producing different maximum intensity locations depending on the optical setup. However, the scattered intensity from different setups can be normalized to provide similar liquid length values if the appropriate reference intensity is known. Light-extinction diagnostics are more quantitative because of a built-in reference light intensity, but can be sensitive to beam-steering effects due to refractive index gradients. The most quantitative diagnostic in this study is a small laser beam with large collection optics to accommodate beam steering. Using a liquid length defined based on 3% of the maximum scatter intensity and the measured optical thickness at this same axial location, we estimate an expected range of liquid volume fraction at this position for the "spray A" conditions of the Engine Combustion Network. Even though there is a possibility that this condition has supercritical mixtures where distinct droplets do not exist, we apply Mie scatter theory with a range of droplet diameters (0.1−10 µm) to mimic how light may scatter at liquid surfaces where density gradients remain sharp and light effectively scatters as if there were a gas-liquid interface. With a measured liquid path length of 1.4 mm, the upper-bound estimate for the path-length-averaged liquid volume fraction is 0.15%.


Articles with similar content:

THE EFFECT OF APERTURE SETTING ON PRESSURE ATOMIZER PHASE DOPPLER ANEMOMETRY MEASUREMENT
ICLASS 94
Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems, Vol.0, 1994, issue
Colin J. Bates
ENGINE COMBUSTION NETWORK: COMPARISON OF SPRAY DEVELOPMENT, VAPORIZATION, AND COMBUSTION IN DIFFERENT COMBUSTION VESSELS
Atomization and Sprays, Vol.22, 2012, issue 10
Michele Bardi, Tim Bazyn, Caroline L. Genzale, Raul Payri, Gilles Bruneaux, Lyle M. Pickett, Julien Manin, Louis Marie C. Malbec
AN APPROACH FOR DETERMINING CONFIDENCE INTERVALS FOR COMMON SPRAY STATISTICS
Atomization and Sprays, Vol.11, 2001, issue 3
James A. Drallmeier, R. M. Wagner
QUANTIFICATION OF TRANSIENT FUEL FILMS UNDER ELEVATED AMBIENT PRESSURE ENVIRONMENTS
Atomization and Sprays, Vol.22, 2012, issue 1
Phil J. Bowen, Mario Alonso, R. Gilchrist, S. M. Sapsford, Peter J. Kay
Time-Resolved Diffraction Granulometer for Measurements in Transient Sprays
International Journal of Fluid Mechanics Research, Vol.24, 1997, issue 4-6
M. Ledoux, D. Lisiecki