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Modeling Atomization and Vaporization Processes of Flash-Boiling Spray
Technical Paper
2004-01-0534
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Flash-boiling occurs when a fuel is injected to a combustion chamber where the ambient pressure is lower than the saturation pressure of the fuel. It has been known that flashing is a favorable mechanism for atomizing liquid fuels. On the other hand, alternative fuels, such as gaseous fuels and oxygenated fuels, are used to achieve low exhaust emissions in recent years. In general, most of these alternative fuels have high volatility and flash-boiling takes place easily in fuel spray, when they are injected into the combustion chamber of an internal combustion engine under high pressure. In addition, fuel design concept the multicomponent fuel with high and low volatility fuels has been proposed in the previous study in order to control the spray and combustion processes in internal combustion engine. It is found that the multicomponent fuel produce flash-boiling with an increase in the initial fuel temperature. Therefore, it is important to investigate these flash-boiling processes in fuel spray.
In the present study, the sub models of flash-boiling spray are constructed. This sub model considers the bubble nucleation, growth and disruption in nozzle orifice and injected fuel droplets. Therefore, the model is implemented into KIVA3V and the spray characteristics of multicomponent fuel with and w/o flashing are numerically investigated. In addition, these numerical results are compared with experimental data which were obtained in the previous study using a constant volume vessel. The flashing spray characteristics from numerical simulation qualitatively shows good agreement with the experimental results. Especially it is confirmed from both the numerical and experimental data that flash-boiling effectively accelerates the atomization and vaporization of fuel droplets. This means that lean homogeneous mixture can be briefly formed by using flash-boiling in combustion chamber.
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Citation
Kawano, D., Goto, Y., Odaka, M., and Senda, J., "Modeling Atomization and Vaporization Processes of Flash-Boiling Spray," SAE Technical Paper 2004-01-0534, 2004, https://doi.org/10.4271/2004-01-0534.Also In
References
- Suma, S. Koizumi, M. “Internal Boiling Atomization by Rapid Pressure Reduction of Liquids” Trans. JSME (B) 43 376 4608 4617 1977
- Sato, K. Lee, C. Nagai, N. “A Study on Atomization Process of Superheated Liquid” Trans. JSME (B) 50 455 1743 1752 1984
- Reitz, R. D. “A Photographic Study of Flash-Boiling Atomization” Aerosol Science and Technology 12 561 569 1990
- Park, B. S. Lee, S. Y. “An Experimental Investigation of The Flash Atomization Mechanism” Atomization and Sprays 4 159 179 1994
- Oza, R. D. Sinnamon, J. F. “An Experimental and Analytical Study of Flash-Boiling Fuel Injection” SAE Paper 830590 1983
- Senda, J. Hojyo, Y. Fujimoto, H. “Modeling of Atomization Process in Flash Boling Spray” SAE Paper 941925 1994
- Zuo, B. Gomes, A. M. Rutland, C. J. “Modeling Superheated Fuel Spray and Vaporization” International Journal of EngineResearch 1 4 321 336 2000
- Senda, J. Kawano, D. Hotta, I. Kawakami, K. Fujimoto, H. “Fuel Design Concept for Low Emission in Engine Systems” SAE Paper 2000-01-1258 2000
- Kawano, D. Senda, J. Kawakami, K. Shimada, A. Fujimoto, H. “Fuel Design Concept for Low Emission in Engine Systems 2nd Report: Analysis of Combustion Characteristics for The Mixed Fuels” SAE Paper 2001-01-0202 2001
- Kawano, D. Senda, J. Kawakami, K. Shimada, A. Fujimoto, H. “Fuel Design Concept for Low Emission in Engine Systems 3rd Report: Analysis of Spray Characteristics for Mixed Fuels” SAE Paper 2002-01-0220 2002
- Kawano, D. Senda, J. Wada, Y. Fujimoto, H. “Fuel Design Concept for Low Emission in Engine Systems 4th Report: Effect of Spray Characteristics of Mixed Fuel on Exhaust Concentrations in Diesel Engine” SAE Paper 2003-01-1038 2003
- Kawano, D. Senda, J. Wada, Y. Fujimoto, H. Goto, Y. Odaka, M. Ishii, H. Suzuki, H. “Numerical Simulation of Multicomponent Fuel Spray” SAE Paper 2003-01-1838 2003
- Ely, J. F. et al. “NIST Thermophysical Properties of Hydrocarbon Mixture Database (SUPERTRAPP) Users' Guide” 1992
- Dan, T. Takagishi, S. Senda, J. Fujimoto, H. “Organized Spray Structure and Motion in Diesel Spray” SAE Paper 970641 1997
- Curtis, E. W. Uludogan, A. Reitz, R. D. “A New High Pressure Droplet Vaporization Model for Diesel Engine Modeling” SAE Paper 952431 1995
- Abramzon, B. Sirignano, W.A. “Droplet Vaporization Model for Spray Combustion Calculations” Int. J. Heat Mass Transfer 32 9 1605 1618 1989
- Nakamura, K. Someya, T. “Investigation on the Tensile Strength of Real Liquids” Trans. JSME (B) 46 405 910 917 1987
- Stralen, S. V. Cole, R. Boiling Phenomena 1 Hemisphere Pub. Washington 1979
- Adachi, M. McDonell, V. G. Tanaka, D. Senda, J. Fujimoto, H. “Characteristics of Fuel Vapor Concentration inside A Flash Boiling Spray” SAE Paper 970871 1997
- Plesset, M. S. Cavitation in Real Liquids Amer. Elsevrer Pub. New York 1 1964
- Ida, T. Sugiya, T. “Motion of Air Bubbles in Mineral Oils Subject to Sudden Change in Chamber Pressure (1st Report, Experimental Analysis for Single Bubbles) Trans. JSME (B) 45 399 1650 1657 1979
- Scriven, L. E. “Dynamics of A Fluid Interface, Chem. Engng. Science 12 2 98 108 1960
- Kawano, D. Azechi, N. Senda, J. Fujimoto, H. “Spray Characteristics of Multicomponent Fuel” The 10th International Symposium on Flow Visualization 2002
- Amsden, A. A. “KIVA3V, Release 2, Improvement to KIVA3V” Los Alamos National Laboratory Report LA-13608-MS 1999
- Akihama, K. Fujikawa, T. Hattori, Y. “Simultaneous Laser-Induced Fluorescence Measurements of In-Cylinder Fuel Behavior of Different Boiling Point Components” Proc. 15th Internal Combustion Engine Symposium (International) Seoul 577 582 1999
- Styron, J. P. Kelly-Zion, P. L. Peters, J. E. White, R. A. “Multicomponent Liquid and Vapor Fuel Distribution Measurements in the Cylinder of a Port Injected, Spark-Ignition Engine” SAE Paper 2000-01-0243 2000