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Soot Formation of Different Diesel-Fuels Investigated by Chemical Luminescence and Laser Induced Incandescence
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 14, 2013 by SAE International in United States
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Differences in thermo-physical parameters of fuels have high impact on the ignition, combustion and emission. Pure rapeseed FAME and diesel fuel with a cetane number of 60 have been compared to reference fuel. In an optical accessible vessel the fuels have been injected in order to investigate the spray, the ignition and soot formation.
The high cetane number fuel showed similar behavior in spray phase to the reference fuel but the FAME fuel is more present at all operating points due to low volatile fuel components.
The ignition and combustion process was investigated via chemical luminescence (CL) and laser induced incandescence (LII). In engine investigations a reduced ignition delay is detected in case of high cetane-number. The more sensitive optical techniques show differences in the combustion process. The ignition behavior of the reference fuel and the increased cetane number fuel were similar until the cetane increaser of the high cetane fuel came into effect. The FAME showed a shortened ignition delay but was found to be slower in combustion propagation.
For the LII investigation a Nd:YAG pulsed laser with a wavelength of 532 nm was used. The light sheet excited the soot particles up to temperatures where the black body radiation is shifted towards the UV-spectra. The soot formation of the reference fuel is equal to the soot formation of the high cetane number fuel until the cetane increaser affected the flame and increased soot production. The soot production of the FAME is advanced in time but overall significantly lower.
CitationVogel, T., Riess, S., Fluegel, A., and Wensing, M., "Soot Formation of Different Diesel-Fuels Investigated by Chemical Luminescence and Laser Induced Incandescence," SAE Technical Paper 2013-01-2667, 2013, https://doi.org/10.4271/2013-01-2667.
- Vogel, T., Lutz, M., Wensing, M., and Leipertz, A. “Influence of fuel mixture on spray formation in diesel processes”. 23rd International Conference on Liquid Atomization and Spray Systems, 2010, Brno, Czech Republic.
- Vogel, T., and Wensing, M. “Effects of fuel composition on spray ignition under engine relevant conditions”. Comodia, The eighth international conference on modeling and diagnostics for advanced engine systems, 2012, Hakata/Fukuoka, Japan.
- “EN 590:2009, Automotive fuels. Diesel. Requirements and test methods”. 2009.
- “EN 14214:2009, Automotive fuels - Fatty acid methyl esters (FAME) for diesel engines”. 2009.
- Mähne. 2010. “Certificate of Analysis RME”. Wittenberg: Louis Dreyfus Commodities GmbH.
- Desantes, J.M., Payri, R.L., García, A., and Manin, J. 2009. “Experimental Study of Biodiesel Blends' Effects on Diesel Injection Processes.” Energy & Fuels 23 (6):3227-3235. doi:10.1021/ef801102w.
- Soltic, P., Edenhauser, D., Thurnheer, T., Schreiber, D., et al. 2009. “Experimental investigation of mineral diesel fuel, GTL fuel, RME and neat soybean and rapeseed oil combustion in a heavy duty on-road engine with exhaust gas aftertreatment.” FUEL 88 (1):1-8. doi:10.1016/j.fuel.2008.07.028.
- Tsolakis, A. 2006. “Effects on Particle Size Distribution from the Diesel Engine Operating on RME-Biodiesel with EGR.” Energy & Fuels 20 (4):1418-1424. doi:10.1021/ef050385c.
- Crua, C., Kennaird, D.A., and Heikal, M.R. 2003. “Laser-induced incandescence study of diesel soot formation in a rapid compression machine at elevated pressures.” Combustion and Flame 135 (4):475-488. doi:10.1016/s0010-2180(03)00183-4.