Laser Research of the Fuel Atomization Process of Internal Combustion Engines
https://doi.org/10.21122/2227-1031-2020-19-1-34-42
Abstract
The paper presents test methods (mechanical, electrical and optical) for the fuel spray research in combustion engines. Optical methods, imaging and non-imaging can be used in laboratory and engine tests. Imaging methods include flash photography and holography. Their use is limited to testing droplet dimensions larger than 5 µm. Imaging methods have an advantage over non-imaging ones because they allow the droplet to be seen at the point and time where its measurement is required. Non-imaging methods can be divided into two groups: the first, which counts and measures, individual droplets one at a time, and the second, which measures a large number of droplets simultaneously. Exemplary results of research of droplet size distribution in fuel sprays are shown. In tests of atomized fuel spray, in conditions reflecting the conditions of the internal combustion engine, the size of droplets, their distribution in the spray and the velocity of individual droplets are presented. To determine the quality of the fuel spray, two substitute diameters Sauter (D32) and Herdan (D43) were selected, the first of which refers to heat transfer and the second to combustion processes. Laser research equipment including Particle Image Velocimetry laser equipment (PIV), Laser Doppler Velocimeter (LDV) and Phase Doppler Particle Analyzer (PDPA) were applied for testing fuel spray distribution for two kind of fuel. The atomization process from the point of view of combustion and ignition processes, as well as emission levels, is characterized by the best substitute diameter D43, which value is close to the median volume. The most harmful droplets of fuel in the spray are large droplets. Even a few such droplets significantly change the combustion process and emission of toxic exhaust components, mainly NOx.
About the Authors
P. StężyckiPoland
Warsaw
M. Kowalski
Poland
Warsaw
A. Jankowski
Poland
Address for correspondence: Jankowski Antoni – Air Force Institute of Technology, 6 Ks. Boleslawa str., 01-494, Warsaw, Republic of Poland. Tel.: +4826 185-13-10 antoni.jankowski@itwl.pl
Z. Sławinski
Poland
Lublin
References
1. Arndt P., Putz W. (1997) Der neue Vierzylinder Dieselmotor OM 611 mit Common-Rail Einspritzsystem ein neues Kapitel der Dieseleinspitztechnik. MTZ Motortechnische Zeitschrift, 58(11), 652-659 (in Russian).
2. Corcione F. E. (2001) (KA-4) Optical Diagnostics in Engines. The Proceedings of the International symposium on diagnostics and modeling of combustion in internal combustion engines (COMODIA 2001), 01.204. https://doi.org/10.1299/jmsesdm.01.204.4
3. Doerr T. (2012) The Significance of Fuel Preparation for Low Emissions Aero-Engine Combustion Technology. ICLASS 2012, 12th Triennial International Conference on Liquid Atomization and Spray Systems, Heidelberg, Germany, September 2-6.
4. Jankowski A., Kowalski M. (2018) Alternative fuel in the combustion process of combustion engines. Journal of KONBIN, 48(4), 55-68. https://doi.org/10.2478/jok-2018-0047
5. Kowalski M., Jankowski A. (2018) Engine test results of fuel-water microemulsion. Proceedings of 31st Congress of the International Council of the Aeronautical Sciences, ICAS 2018 − Belo Horizonte, Brazil. Available at: www.icas.org/ICAS_ARCHIVE/ICAS2018/data/preview/ICAS2018_0769.htm. Code 143115
6. Kozakiewicz A., Kowalski M. (2013) Unstable operation of the turbine aircraft engine. Journal of Theoretical and Applied Mechanics, 51(3), 719-727.
7. Żurek J, Kowalski M. Jankowski A. (2015) Modelling of Combustion Process of Liquid Fuels under Turbulent Conditions. Journal of KONES, 22 (4), 355-363. https://doi.org/10.5604/12314005.1193063
8. Raffel M., Willert C. E., Kompenhans J. (1998) Particle Image Velocimentry. Springe Verlog. https://doi.org/10.1007/978-3-662-03637-2
9. Jankowski A., Kowalski M., Slawinski Z. (2016) Research of alternative fuel water-fuel micro emulsion from point of view reduction of emissions. Proceedings of 30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016, Code 126186. Available at: www.icas.org/ICAS_ARCHIVE/ICAS2016/data/preview/2016_0667.htm.
10. Jankowski A., Kowalski M. (2015) Influence of the quality of fuel atomization on the emission of exhaust gases toxic components of combustion engines. Journal of KONBIN, 36 (1), 43-50. https://doi.org/10.1515/jok-2015-0055
11. Jankowski A., Kowalski M. (2015) Creating mechanisms of toxic substances emission of combustion engines. Journal of KONBIN, 36 (1), 33-42. https://doi.org/10.1515/jok-2015-0054
Review
For citations:
Stężycki P., Kowalski M., Jankowski A., Sławinski Z. Laser Research of the Fuel Atomization Process of Internal Combustion Engines. Science & Technique. 2020;19(1):34-42. https://doi.org/10.21122/2227-1031-2020-19-1-34-42