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Experimental Determination of Fuel Additive Effects on Leidenfrost Temperature and Deposit Formation
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Abstract
Deposit formation in the induction system of port-fuel-injected engines depends on the fuel-droplet/metal-surface interaction. Previous studies have shown that the metal surface temperature is a critical parameter in deposit formation. Droplet-surface behavior is characterized by the droplet boiling temperature, Nukiyama temperature (at which the droplet has a minimum lifetime), and the Leidenfrost temperature (at which the droplet levitates above the surface on a vapor layer and has a maximum lifetime). In this work, we investigate the effect of fuel additives on deposit formation and on the Leidenfrost temperature. Two experimental apparatuses were used. To determine the temperature range of deposit formation for fuels with different additives, droplets were allowed to impinge upon a heated ramp with a large temperature gradient. The temperature at which the droplets stop sliding and disappear was determined from the position of the residue formation on the ramp. In addition, the Leidenfrost temperature for each additized fuel was directly measured using a high-speed video camera to image the dynamic impact behavior of single falling droplets on a heated metallic surface. The Leidenfrost temperature, defined as the point when the falling droplets no longer recoil as the metallic surface temperature is decreased, was determined for the same additized fuel droplets. The surfactants were found to decrease the Leidenfrost temperature when they were introduced at a concentration above a critical level. The results from these two apparatuses will be compared.
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Citation
Mach, T., Sung, R., Liiva, P., Acker, W. et al., "Experimental Determination of Fuel Additive Effects on Leidenfrost Temperature and Deposit Formation," SAE Technical Paper 930774, 1993, https://doi.org/10.4271/930774.Also In
References
- Gething J.A. “Performance Robbing aspects of Intake Valve and Port Deposits” SAE Paper No. 872116 1987
- Houser K.R. Crosby T.A. “The Impact of Intake Valve Deposits on Exhaust Emissions” SAE Paper No. 922259 1992
- Megnin M.K. Ferman J.B. “Gasoline Effects on Octane Requirement Increase and Combustion Chamber Deposits” SAE Paper No. 922258 1992
- Bitting B. Gschwendtner F. Kohlhepp W. Kothe M. Testroet C.J. Ziwica K.H. “Intake Valve Deposits - Fuel Detergency Requirements Revisted” SAE Paper No. 872117 1987
- Kalghatgi G.T. “Deposits in Gasoline Engines - A Literature Review” SAE Paper No. 902015 1990
- Daneshgari P. “A Test Procedure for Identifying the Gasoline's Deposit Formation Tendency on Intake Valves” SAE Paper No. 892120 1989
- Cheng S.S. “The Physical Parameters that Influence Deposit Formation on an Intake Valve” SAE Paper No. 922257 1992
- Cheng S.S. “Effect of Engine Operating Parameters on Engine Combustion Chamber Deposits” SAE Paper No. 902108 1990
- Chandra S. Avedisian C. T. “On the Collision of a Droplet with a Solid Surface” Proc. R. Soc. Lond. 432 13 41 1991
- Mills A.A. Fry J.D. “Rate of evaporation of hydrocarbons from a hot surface: Nukiyama and Leidenfrost temperatures” Eur. J. Phys. 3 152 154 1982
- Law C.K. “Recent Advances in Droplet Vaporization and Combustion” Prog. Energy Combust. Sci. 1982 8 171 201 Pergamon Press Ltd
- Serpenguzel A. Chang R.K. Acker W.P. Sung R.L. “Laser Diagnostic Techniques for Characterizing Droplet Size, Composition, and Differential Evaporation in Fuel Sprays” SAE Paper No. 925030 1992
- Daneshgari P. Borgmann K. Job H. “The influence of Temperature Upon Gasoline Deposit Build-up on the Intake Valves” SAE Paper No. 890215 1989
- Daneshgari P. “A Test Procedure for Identifying the Gasoline's Deposit Formation Tendency on Intake Valves” SAE Paper No. 892120 1989
- Buevich Y.A. Mankevich V.N. “Theory of the Liedenfrost Phenomenon” Teplofizika Vysokikh Temperatur 20 6 1136 1144 1982
- Mills A.A. Fry J.D. “Rate of evaporation of hydrocarbons from a hot surface: Nukiyama and Leidenfrost temperatures” Eur. J. Phys. 3 152 154 1982