Efficiency of Fiber Dispersion
Abstract
Net efficiencies for the dissemination of graphitic fibers are determined for two continuous processes (fibers cut as part of the dispersion process or precut). In both cases an extensive grid of passive dosimetric samplers inset with a coarser grid of time resolved aerosol density samplers provided an absolute time average dosage profile, which was integrated over space to give the total effective airborne aerosol mass. The efficiency is expressed as a ratio of the airborne mass to the total mass dispersed from the bulk. For lower dosages corresponding to a dispersed mass of less than 1 lb, use of the passive, high spatial resolution grid gave efficiencies at about the 50- percent level with no large deviations from the mean. At larger dosages, for which the total mass dispersed ranged from about 1 lb to about 50 lb, only the values obtained using coarser grid (3 x 3 instruments) were valid. In the latter case the variation in efficiency was much larger, but the average indicates at least the same level of efficiency. Dispersion rates varied from 1 lb/minute to 10 lb/minute. Dispersion, Fibrous aerosol, Efficiency.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1993
- Accession Number
- ADA269740
Entities
People
- A. V. Jelinek
- Charles W. Bruce
- Mike J. Thurston
Organizations
- United States Army Research Laboratory