This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
High-Speed UV and Visible Laser Shadowgraphy of GDI In-Cylinder Pool Fire
Technical Paper
2016-01-2165
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
For better understanding, model development and its validation of in-cylinder soot formation processes of Gasoline Direct Injection (GDI) engines, visualization of piston surface fuel wetting, vaporization and soot formation processes of in-cylinder pool fire via high-speed UV (266nm) and visible (445nm) laser shadowgraphy was attempted in an optically accessible Rapid Compression and Expansion Machine (RCEM). A direct-injection, spark-ignition and single-shot combustion event was achieved in the RCEM under engine-equivalent, simplified and well-defined conditions operated with engine speed 600 rpm, compression ratio 9.0, equivalence ratio 0.9 and natural aspiration. The tested fuel was composed of 70% iso-octane and 30% toluene by volume and the UV absorption by toluene enabled visualization of the in-cylinder fuel distribution. Significant UV absorption was caused also by in-cylinder soot particles, which was reasonably distinguishable from the fuel by comparing the UV shadowgraphs with visible shadowgraphs and direct photographs of soot luminosity taken under identical conditions. The obtained high-speed shadowgraphs successfully demonstrated the potential of the visualization technique for qualitative visualization of fuel spray, mixture formation, piston surface fuel wetting and vaporization, qualitative measurement of piston surface fuel film thickness and distinction between pool fire soot and bulk combustion soot, which will be beneficial for fundamental understanding of the process and the model development.
Recommended Content
Authors
Topic
Citation
Miyashita, K., Tsukamoto, T., Fukuda, Y., Kondo, K. et al., "High-Speed UV and Visible Laser Shadowgraphy of GDI In-Cylinder Pool Fire," SAE Technical Paper 2016-01-2165, 2016, https://doi.org/10.4271/2016-01-2165.Also In
References
- Drake , M. , Fansler , T. , Solomon , A. , and Szekely , G. Piston Fuel Films as a Source of Smoke and Hydrocarbon Emissions from a Wall-Controlled Spark-Ignited Direct-Injection Engine SAE Technical Paper 2003-01-0547 2003 10.4271/2003-01-0547
- Stevens , E. and Steeper , R. Piston Wetting in an Optical DISI Engine: Fuel Films, Pool Fires, and Soot Generation SAE Technical Paper 2001-01-1203 2001 10.4271/2001-01-1203
- Kashdan , J. Tracer LIF Visualisation Studies of Piston-Top Fuel Films in a Wall-Guided, Low-NOx Diesel Engine SAE Technical Paper 2008-01-2474 2008 10.4271/2008-01-2474
- Park , S. and Ghandhi , J. Fuel Film Temperature and Thickness Measurements on the Piston Crown of a Direct-Injection Spark-Ignition Engine SAE Technical Paper 2005-01-0649 2005 10.4271/2005-01-0649
- Ueki Takeshi and Murase Eiji Investigation of In-Cylinder Soot Distribution in a DISI Engine Journal of Automotive Engineering 46 2 337 342 2015
- Manin J. , Bardi M. , Pickett L. M. , Payri R. Boundary condition and fuel composition effects on injection processes of high-pressure sprays at the microscopic level International Journal of Multiphase Flow 2015 10.1016/j.ijmultiphaseflow.2015.12.001
- Steimle , F. , Kulzer , A. , Richter , H. , Schwarzenthal , D. et al. Systematic Analysis and Particle Emission Reduction of Homogeneous Direct Injection SI Engines SAE Technical Paper 2013-01-0248 2013 10.4271/2013-01-0248
- Kuribayashi , M. , Mizutani , Y. , Ishizuka , Y. , Taki , N. et al. Effects of Ambient Oxygen Concentration on Soot Processes in Diesel Spray Flame - A Qualitative Comparison between TEM Analysis and LII/Scattering Laser Measurements SAE Int. J. Fuels Lubr. 7 3 693 703 2014 10.4271/2014-01-2642
- Aizawa , T. , Nishigai , H. , Kondo , K. , Yamaguchi , T. et al. Transmission Electron Microscopy of Soot Particles Directly Sampled in Diesel Spray Flame - A Comparison between US#2 and Biodiesel Soot SAE Int. J. Fuels Lubr. 5 2 665 673 2012 10.4271/2012-01-0695
- Kondo , K. , Aizawa , T. , Kook , S. , and Pickett , L. Uncertainty in Sampling and TEM Analysis of Soot Particles in Diesel Spray Flame SAE Technical Paper 2013-01-0908 2013 10.4271/2013-01-0908
- Kook , S. , and Pickett , L. Soot Volume Fraction and Morphology of Conventional, Fischer-Tropsch, Coal-Derived, and Surrogate Fuel at Diesel Conditions SAE Int. J. Fuels Lubr. 5 2 647 664 2012 10.4271/2012-01-0678
- Lee , K.O. , Cole , R. , Sekar , R. , Choi , M. Y. , Kang , J. S. , Bae , C. S. and Shin , H. D. Morphological Investigation of the Microstructure, Dimensions, and Fractal Geometry of Diesel Particulates Proc. Combust. Inst. 29 1 647 653 2002 10.1016/S1540-7489(02)80083-9
- Wei , J. , Song , C. , Lv , G. , Song , J. , Wang , L. and Pang , H. A comparative study of the physical properties of in-cylinder soot generated from the combustion of n -heptane and toluene/ n -heptane in a diesel engine Proceedings of the Combustion Institute 35 2 1939 1946 2015 10.1016/j.proci.2014.06.011
- Li , Z. , Song , C. , Song , J. , Lv , G. , Dong , S. , and Zhao , Z. Evolution of the nanostructure, fractal dimension and size of in-cylinder soot during diesel combustion process Combust. Flame 158 8 1624 1630 2011 10.1016/j.combustflame.2010.12.006
- Miyashita , K. , Fukuda , Y. , Shiozaki , Y. , Kondo , K. et al. TEM Analysis of Soot Particles Sampled from Gasoline Direction Injection Engine Exhaust at Different Fuel Injection Timings SAE Technical Paper 2015-01-1872 2015 10.4271/2015-01-1872
- Seong , H. , Lee , K. , and Choi , S. Effects of Engine Operating Parameters on Morphology of Particulates from a Gasoline Direct Injection (GDI) Engine SAE Technical Paper 2013-01-2574 2013 10.4271/2013-01-2574
- Lee , K. , Seong , H. , Sakai , S. , Hageman , M. et al. Detailed Morphological Properties of Nanoparticles from Gasoline Direct Injection Engine Combustion of Ethanol Blends SAE Technical Paper 2013-24-0185 2013 10.4271/2013-24-0185
- Miwa , K. , Mohammadi A. , Kidoguchi , Y A Study on Thermal Decomposition of Fuels and NOx Formation in Diesel Combustion using a Total Gas Sampling Technique Int. J. Engine Research 2 3 189 198 2001
- Kitajima , I. and Azetsu , A. Visualization of Lubricating Oil Film Using Photochromism-Simultaneous Measurement of Oil Film Thickness and Flow- The 26th Japanese Domestic Internal Combustion Engines symposium Paper-No.20158040 Japan 2015
- Koban W. , Koch J. D. , Hanson R. K. , Schulz C. Absorption and fluorescence of toluene vapor at elevated temperatures Phys. Chem. Chem. Phys. 2004 6 2940 2945 10.1039/B400997E