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Effect of Ambient Temperature and Droplet Size of a Single Emulsion Droplet on Auto-ignition and Micro-explosion  

Jeong, In-Cheol (Graduate School, Sunchon National University)
Lee, Kyung-Hwan (Department of Aerospace Engineering, Sunchon National University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.15, no.1, 2007 , pp. 49-55 More about this Journal
Abstract
The characteristics of auto-ignition and combustion process of a single droplet of emulsified fuel suspended in a high-temperature air chamber have been investigated experimentally with various droplet sizes, surrounding temperatures, and water contents. The used fuels was n-Decane and it was emulsified with varied water contents whose maximum is 30%. The high-speed camera has been adopted to measure the ignition delay and flame life time. It was also applied to observe micro-explosion behaviors. The increase of droplet size and chamber temperature cause the decrease of the ignition delay time and flame life-time. As the water contents increases, the ignition delay time increases and the micro-explosion behaviors are strengthened. The starting timings of micro-explosion and fuel puffing are compared for different droplet sizes and the amount of water contents.
Keywords
Emulsion droplet; Auto-ignition; Ignition delay; Life time; Micro-explosion;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 T. Tsukamoto and T. Niioka, 'Dynamics of Heterogenous Combustion and Reacting System,' Progress in Aeronautics and Astonautics, AIAA, Vol.152, p.263. 1993
2 R. Nakanishi, H. Kobayashi, S. Kato and T. Niioka, 'Ignitiobn Experiment of a Fuel Droplet in High-Pressure High Temperature Ambient,' 25th Symp.(Int.) on Comb., The Combustion Institute, p.447, 1994
3 H.-J. Seo, S.-M. Oh and H.-I. Huh, 'Spray Characteristics and Exhaust Emission Tests for a Diesel Engine Using Emulsified Fuels,' Transactions of KSAE, Vol.10, No.4, pp.60-68, 2002
4 C. K. Law, C. H. Lee and N. Spinivasan, 'Combustion Characteristics of Water-in-Oil Emulsion Droplets,' Combustion and Flame, Vol.37, p.125. 1980   DOI   ScienceOn
5 F. R. Dryer, 'Water Addition to Practical Combustion System Concepts and Applications,' 16th Symposium(Int.) on Combustion, pp.279-295, 1976
6 D. H. Cook and C. K. Law, 'A Preliminary Study on the Utilization of Water-in-Oil Emulsion in Diesel Engines,' Combustion Science and Technology, Vol.18, No.5, pp.217-221, 1978   DOI