Supersonic free jet virtual impactor for separation of aerosol particles according to size
A novel free jet virtual impactor device to separate aerosol particles by aerodynamic size with high resolution is described. The device can distinguish both spherical and highly non-spherical particles such as asbestos fibers. Aerosol particles are formed into a uniform velocity beam via expansion through a sonic capillary nozzle into a vacuum. The particle beam is differentially decelerated in the free jet virtual impactor and the particles are separated by aerodynamic size. Asbestos fibers are separated as a function of their diameter and independent of fiber length. A theoretical model describing the behavior of aerosol particulates in the free jet virtual impactor is presented and verified by experiments with latex sphere and chrysotile asbestos fiber aerosols.
- Research Organization:
- Princeton Univ., NJ (USA)
- OSTI ID:
- 5231618
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ASBESTOS
SEPARATION PROCESSES
PARTICLE SIZE CLASSIFIERS
PARTICULATES
AERODYNAMICS
AEROSOLS
AIR POLLUTION
FIBERS
MATHEMATICAL MODELS
PARTICLE SIZE
COLLOIDS
DISPERSIONS
EQUIPMENT
FLUID MECHANICS
MECHANICS
PARTICLES
POLLUTION
SIZE
SOLS
440300* - Miscellaneous Instruments- (-1989)