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Droplets Behavior and Evaporation of Diesel Spray Affected by Ambient Density after Pilot Injection
Technical Paper
2015-32-0724
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A fundamental study on spray behavior for small quantity injection under high boosting and high temperature conditions was carried out by applying dual nano-spark shadowgraph photography method to constant volume spray chamber filled with inert gas. The study showed macro-scale and micro-scale spray structures and dynamic changes of diesel spray affected by ambient density and temperature right after the pilot injection. Detailed observation and analysis of the images showed that high density surrounding gas decreases the mainstream velocity of the spray after injection, which restrains air entrainment into the spray. There is a change of flying direction of the droplets at spray boundary under high density condition. Many droplets move outward from the spray after the lapse of time. Spray evaporation is promoted by vaporization of droplets at spray boundary. High density condition greatly promotes droplets evaporation at spray boundary. However, at high density condition, large size droplets tend to remain at a long time at the vicinity of injector outlet after small amount of injection.
Authors
Citation
Nawi, M., Uwa, N., Ueda, Y., Nada, Y. et al., "Droplets Behavior and Evaporation of Diesel Spray Affected by Ambient Density after Pilot Injection," SAE Technical Paper 2015-32-0724, 2015, https://doi.org/10.4271/2015-32-0724.Also In
References
- Naber , J. , Siebers , D. Effects of Gas Density and Vaporization on Penetration and Dispersion of Diesel Sprays SAE Paper No. 960034 1996
- Alfuso , S. , Allocca , L. , Auriemma , M. , Caputo , G. Analysis of a High Pressure Diesel Spray at High Pressure and Temperature Environment Conditions SAE Paper No. 2005-01-1239 2005
- Mohammadi , A. , Kidoguchi , Y. , Miwa , K. Effect of Injection Parameters and Wall-Impingement on Atomization and Gas Entrainment Processes in Diesel Sprays SAE Paper No. 2002-01-0497 2002
- Arcoumanis , C. , Chang , J-C. Heat transfer between a heated plate and an impinging transient diesel spray Experiments in Fluids 16 105 119 1993
- Park , S. W. , Lee , C. S. Macroscopic and microscopic characteristics of fuel spray impinged on the wall Experiments in Fluids 37 745 762 2004
- Adam , A. , Yatsufusa , T. , Gomi , T. , Irie , N. et al. Analysis of Droplets Evaporation Process of Diesel Spray at Ignition Delay Period using Dual Nano-spark Shadowgraph Photography Method SAE Int. J. Engines 2 2 703 711 2010
- Mohammadi , A. , Miwa , K. , Ishiyama , T. , Abe , M. Investigation of Droplets and Ambient Gas Interaction in a Diesel Spray Using a Nano-Spark Photography Method SAE Paper No. 981073 1998
- Hiroyasu , H. Arai , M. Structures of Fuel Sprays in Diesel Engines SAE Paper No. 900475 1990
- Takeuchi , K. , Murayama , H. , Senda , J. , Yamada , K. Droplet Size Distribution in Diesel Fuel Spray Bulletin of the JSME, No. 26 215 16 1983
- Hiroyasu , H. Kadota , T. Fuel Droplet Size Distribution in Diesel Combustion Chamber SAE Paper No. 740715 1974
- Koo , J.Y. , Martin J.K. Ambient Gas Density Effects on Droplets Diameter and Velocity in Transient Diesel Fuel Spray COMODIA C90 225 230 1990
- Han , Z. , Uludogan , A. , Hampson , G. , Reitz , R. Mechanism of Soot and NOx Emission Reduction Using Multiple-injection in a Diesel Engine SAE Paper No. 960633 1996
- Nishida , K. , LI , K. , Matsuo , T. , Shimo , D. et al. Small Injection Amount Fuel Spray Characteristics Injected by Hole-Type Nozzle for D.I. Diesel Engine SAE Int. J. Engines 8 1 277 287 2015 10.4271/2014-32-0124
- Pickett , L. , Kook , S. , and Williams , T. Transient Liquid Penetration of Early-Injection Diesel Sprays SAE Int. J. Engines 2 1 785 804 2009 10.4271/2009-01-0839
- Ishiyama , T. , Miwa , K. , Kamogama , M. , Liu , Y. , Miyashiro , S. Observations of Macroscopic Structures of Diesel Sprays with a Nano-spark Light Source Trans. of JSME, Series B 60 570 715 721 1994
- Nawi , M.A.H. , Kidoguchi , Y. , Nakagiri , M. , Uwa , N. Macro- and Micro-scale Observation on Dynamic Behavior of Diesel Spray Affected by Ambient Density and Temperature SAE Paper No. 2014-32-0125 2014
- Yatsufusa , T. , Kidoguchi , Y. , Abdullah , A. Gomi , T. Measurement of particle diameter in diesel spray by long distance microscopic shadowgraph photography Atomization 18 63 2 9 2009
- Khalid , A. , Yatsufusa , T. , Miyamoto , T. , Kawakami , J. Analysis of Relation between Mixture Formation during Ignition Delay Period and Burning Process in Diesel Combustion SAE Paper No. 2009-32-0018 2009
- Nada , Y. , Komatsubara , Y. , Pham , T. , Yoshii , F. et al. Evaluation of NOx Production Rate in Diesel Combustion Based on Measurement of Time Histories of NOx Concentrations and Flame Temperature SAE Int. J. Engines 8 1 303 313 2015 10.4271/2014-32-0133