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Film Atomization from Valve Surfaces During Cold Start
Technical Paper
1999-01-0566
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The goal of this work is to begin to understand and characterize the break-up of liquid fuel as it is torn from intake valve and port surfaces during the start-up period of a spark ignition engine. The lack of vaporization from warm engine surfaces causes the fuel to enter the combustion chamber as large droplets. Atomization results from the shearing effect of the intake air as it is pulled into the combustion chamber. Droplet sizes, air velocities, and break-up formations are studied using a high-resolution CCD camera and strobe. Indolene and iso-octane fuels are used to consider the effect of fuel properties on the break-up. The atomization processes that occur are characterized through the use of dimensionless groups. Results show that the fuel break-up follows the same processes seen for many other atomizing devices under the influence of co-flowing air. The role of valve gap, liquid fuel flowrate, air flowrate, and valve dimensions on the break-up process are discussed.
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Citation
Koederitz, K. and Drallmeier, J., "Film Atomization from Valve Surfaces During Cold Start," SAE Technical Paper 1999-01-0566, 1999, https://doi.org/10.4271/1999-01-0566.Also In
References
- Shin, Y. Cheng, W. K. Heywood, J. B. “Liquid Gasoline Behavior in the Engine Cylinder of a SI Engine,” SAE Paper 941872 1994
- Meyer, R. Heywood, J. B. “Liquid Fuel Transport Mechanisms into the Cylinder of a Firing Port-Injected SI Engine During Start Up,” SAE Paper 970865 1997
- Kelly-Zion, P. L. DeYoung, C. A. Peters, J. E. White, R. A. “In-Cylinder Fuel Drop Size and Wall Impingement Measurements,” SAE Paper 952480 1995
- Mansour, A. Chigier, N. “Disintegration of Liquid Sheets,” Physics of Fluids 2 5 May 1990
- Curtis, E. W. Aquino, C. F. Trumpy, D. K. Davis, G. C. “A New Port and Cylinder Wall Wetting Model to Predict Transient Air/Fuel Excursions in a Port Fuel Injected Engine,” SAE Paper 961186 1996
- Heywood, J. B. Internal Combustion Engine Fundamentals McGraw-Hill, Inc. 220 228 1988
- Kastner, L. J. Williams, T. J. White, J. B. “Poppet Inlet Valve Characteristics and Their Influence on the Induction Process,” Proc. Instn. Mech. Engrs. 1963-64
- Fraser, R. P. Dombrowski, N. Routley, J. H. “The Atomization of a Liquid Sheet by an Impinging Air Stream,” Chemical Engineering Sciences 1963
- Kelly-Zion, P. L. Whelan, D. E. Lee, C. F. Lucht, R. P. Peters, J. E. White, R. A. “Intake Port and In-Cylinder Spray Measurements in Motored Spark Ignition Engines,” 10 th Annual Conference on Liquid Atomization and Spray Systems May 1997