THE IMPACTION OF AIRBORNE PARTICLES ON PLATE COLLECTORS
Abstract
Impaction data for a plate collector exposed to falling particles that were produced by explosive eruptions of volcano Irazu were correlated, and approximating functions for representing the impaction coefficients of the plates were derived from the data. The arrangement of the plates at 0 (180), 30, 60, 90, 120, and 150 degrees from the horizontal provided four classes of impaction geometries. An approximate relationship between the impaction or collecting efficiency of the plates and the tray collector (or the ground surface) was also derived. The plate collector data were used to estimate the effective average diameter of the falling particles, and, with a few exceptions, this diameter was always greater than the mass median diameter determined from sieve analysis of the particles. Thus it was concluded that, in the majority of the particle showers, the particles fell and impacted as agglomerates of many smaller particles.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1967
- Accession Number
- AD0663800
Entities
People
- Carl F. Miller
Organizations
- SRI International