An Experimental Investigation of Acoustic Precipitation of Aerosols At Moderate Sound Intensity.
NTIS: PB/222-755 Available for Reference At Bureau Libraries :33 pages
Results of an experimental investigation into the possible use medium energy acoustic fields (130 to 140 db) to precipate 1- to 10- micrometer particles are presented. The aerosol was produced with a commercial generator using oleic acid and nitrogen. The sound field was a sinusoidal standing wave field in an acrylic tube, with light transmission data used for concentration determination. The results showed collection efficiencies of up to 80 percent on 2-micrometer particles with a residence time of 11.8 Seconds at a sound pressure level of 139 db re 2 x 10-5 n/m2. A discussion of the possible turbulent mechanism is made, as well as review and comparison with others' work.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/222-755; Available for Reference At Bureau Libraries