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Vortices in anisoaxial sampling inlets.

Authors
Chen-CC; Baron-PA
Source
Aerosol Sci Tech 1995 Aug; 23(2):224-230
NIOSHTIC No.
20035508
Abstract
Thin-walled inlets are used in a variety of instruments and sampling devices, quite often under anisoaxial conditions. An earlier study demonstrated a new visualization technique for observing vortices formed in a tubular inlet and indicated the effect of varying sampling rate and angle. The effect of the flow pattern on gravitational setting, inertial separation, and electrostatic interaction was observed. The present study extends this work by examining these effects over a wider range of sampling conditions and for some different inlet configurations. The vortices formed as a result of anisoaxial sampling change their location and increase in intensity and size with increasing external air velocity. The vortices appear even for relatively short inlets. A flared inlet appears to eliminate the vortices for sampling angles of less than 90 degrees.
Keywords
Air-flow; Air-monitoring; Air-sampling; Air-sampling-equipment; Air-sampling-techniques; Mathematical-models; Statistical-analysis
CODEN
ASTYDQ
Publication Date
19950801
Document Type
Journal Article
Fiscal Year
1995
NTIS Accession No.
NTIS Price
Issue of Publication
2
ISSN
0278-6826
NIOSH Division
DPSE
Source Name
Aerosol Science and Technology
State
OH
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