Vortices in Anisoaxial Sampling Inlets

Details

• Personal Author:
  Baron, Paul A. ; Chen CC
• Description:
  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. [Description provided by NIOSH]
• Subjects:
  Air Movements Environmental Monitoring Occupational Health Safety
• Keywords:
  Air-flow Air-monitoring Air-sampling Air-sampling-equipment Air-sampling-techniques Mathematical-models Statistical-analysis
• ISSN:
  0278-6826
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DPSE - Division of Physical Sciences and Engineering
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  224-230
• Volume:
  23
• Issue:
  2
• NIOSHTIC Number:
  nn:20035508
• Citation:
  Aerosol Sci Technol 1995 Aug; 23(2):224-230
• Contact Point Address:
  Paul A. Baron, US. Department of Health and Human Services Public Health Service, Centers For Disease Control and Prevention, National Institute for Occupational Safety and Health, Division of Physical Sciences and Engineering, Cincinnati, OH 45226, USA
• Federal Fiscal Year:
  1995
• Peer Reviewed:
  True
• Source Full Name:
  Aerosol Science and Technology
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:95fe247c0ba5cd73f447cf9109b1d9b8374acc82547284237b0b57b757205f3be3c9d18fb5ed21c1a484daf725384cde057a2004e8ecb1d116c1b215a85faa60
• Download URL:
  https://stacks.cdc.gov/view/cdc/187341/cdc_187341_DS1.pdf
• File Type:
  [PDF - 766.83 KB ]