D. F. Dolan, D. B. Kittelson, K. T. Whitby

Research output: Contribution to journalConference articlepeer-review


A technique is described for determining particle size distributions of diesel engine exhaust smoke using an electrical aerosol analyzer. Diesel smoke is a highly concentrated aerosol. As such, it is a dynamic system undergoing rapid changes as a result of condensation and coagulation processes. Consequently, great care must be taken to prevent falsification when sampling this system. A dilution probe has been developed which rapidly dilutes an exhaust sample with clean air, effectively freezing condensation and coagulation processes. The diluted exhaust is collected in a teflon holding bag and subsequently analyzed. An electrical aerosol analyzer is used to determine the particle size distribution in the 0. 0075 to 0. 6 mu m diameter size range. The data allow total aerosol volume concentrations and (assuming unity particle density) mass concentration to be determined as well.

Original languageEnglish (US)
JournalAmerican Society of Mechanical Engineers (Paper)
Issue number75 -WA/APC-5
StatePublished - Jan 1 1975
EventUnknown conference -
Duration: Nov 30 1975Dec 5 1975


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