This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Physical Size Distribution Characterization of Diesel Particulate Matter and the Study of the Coagulation Process
Annotation ability available
Sector:
Language:
English
Abstract
Diesel particulate matter in both the diluted and undiluted state is subject to the processes of coagulation, condensation or evaporation, and nucleation which causes continuous changes in its physical characteristics. The Electrical Aerosol Analyzer (EAA) is used to measure the diesel particle size distribution in the MTU dilution tunnel for a naturally aspirated direct-injection diesel engine operated on the EPA 13 mode cycle.
The design and development of accurate and repeatable sampling methods using the EAA are presented. These methods involve both steady-state tunnel and bag measurements. The data indicate a bimodal nature within the 0.001 to 1 μm range.
The first mode termed the “embroynic mode” has a saddle point between 0.005 to 0.015 μm and the second mode termed the “aggregation mode” lies between .08 to .15 μm for the number distribution. The particle concentration decreases with time and the resulting size distribution function approaches an asymptotic steady-state solution indicating the self-preserving nature of particulate size distributions. Coagulation constants have been calculated for the diesel particles and are compared to theoretical values in the literature.
Recommended Content
Topic
Citation
Khatri, N. and Johnson, J., "Physical Size Distribution Characterization of Diesel Particulate Matter and the Study of the Coagulation Process," SAE Technical Paper 780788, 1978, https://doi.org/10.4271/780788.Also In
References
- Khatri N. J. Johnson John H. Leddy David G. “The Characterization of the Hydrocarbon and Sulfate Fractions of Diesel Particulate Matter” SAE paper no. 780111 SAE Congress and Exposition February 27 March 3 1978
- Lipkea William H. Johnson John H. Vuk Carl T. “The Physical and Chemical Character of Diesel Particulate Emissions - Measurement Techniques and Fundamental Considerations” SAE Special Publication 430 SAE Congress and Exposition February 27 March 3 1978
- Khatri N. J. “The Measurement of Diesel Particulate Matter Size Distribution Using the Electrical Aerosol Analyzer and the Analysis of the Sulfate Fraction using the Barium Chlaranilate Method” Michigan Technological University 1977
- Vuk C. T. Jones M. A. Johnson J. H. “The Measurement and Analysis of the Physical Character of Diesel Particulate Emissions” SAE paper no. 760131 SAE Transactions 1976
- Miller D. F. Trayser D. A. Joseph D. W. “Size Distribution of Sulfuric Acid Aerosol Emissions” SAE paper no. 7600141 February 1976
- Kittelson D. B. Dolan D. F. Verrant J. F. “Investigation of a Diesel Exhaust Aerosol” SAE paper no. 780109 SAE Congress and Exposition Detroit February 27 March 3 1978
- Dolan D. F. Kittelson D. B. “Diesel Exhaust Aerosol Particle Size Distributions - Comparison of Theory and Experiment” SAE paper no. 780110 SAE Congress and Exposition Detroit February 27 March 3 1978
- Randolph D. A. Larson M. A. “Theory of Particulate Processes” Academic Press London 1971
- Liu B. Y. H. Pui D. Y. H. Kapadia A. “Electrical Aerosol Analyzer: History, Principle and Application” Aerosol Measurement Workshop University of Florida Gainsville, Florida March 1976
- Thermo-Systems, Inc. “Operation and Service Manual - Model 3030 Electrical Aerosol Size Analyzer” St. Paul, MN 1975
- Friedlander S. K. Wang C. S. Col J. Interface Science 22 126 1966 24 170 1967
- Friedlander S. K. Wang C. S. Ind. Eng. Chem. 49 1151 1957
- Lui B. Y. H. Ilori T. A. “Aerosol Deposition in Turbulent Pipe Flow” Environmental Science and Technology 8 351 1974
- Whitby K. T. et al “The Electrical Behavior of Aerosols” Aerosol Science 59 1966
- Whitby K. T. Kittelson D. B. Dolan D. F. “Measurement of Diesel Exhaust Particle Size Distribution” Annual ASME Meeting Houston November-December 1975
- Smoluchowski M. Z. Physik Chem. 1917 1917
- Zebel G. “Coagulation of Aerosols” Aerosol Science 31 57 1966
- Fuchs, N. A. “Mechanics of Aerosols” N.Y. 1964