A recirculation aerosol wind tunnel for evaluating aerosol samplers and measuring particle penetration through protective clothing materials

Details

• Personal Author:
  Gao, Peng-Fei ; Hsiao-T-C ; Jaques PA
• Description:
  A recirculation aerosol wind tunnel was designed to maintain a uniform airflow and stable aerosol size distribution for evaluating aerosol sampler performance and determining particle penetration through protective clothing materials. The oval-shaped wind tunnel was designed to be small enough to fit onto a lab bench, have optimized dimensions for uniformity in wind speed and particle size distributions, sufficient mixing for even distribution of particles, and minimum particle losses. Performance evaluation demonstrates a relatively high level of spatial uniformity, with a coefficient of variation of 1.5-6.2% for wind velocities between 0.4 and 2.8 m s21 and, in this range, 0.8-8.5% for particles between 50 and 450 nm. Aerosol concentration stabilized within the first 5-20 min with, approximately, a count median diameter of 135 nm and geometric standard deviation of 2.20. Negligible agglomerate growth and particle loss are suggested. The recirculation design appears to result in unique features as needed for our research. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Environmental Monitoring Laboratories Microbiology Occupational Health Particulate Matter Safety
• Keywords:
  Aerosol-particles Aerosol-sampling Aerosol Chamber Aerosol Samplers Air-monitoring Air-samplers Air-sampling Air-sampling-equipment Air-sampling-techniques Airborne-particles Analytical-processes Author Keywords: Aerosols Fiber-deposition Filter-fabrics Laboratory-techniques Laboratory-testing Mathematical-models Measurement-equipment Microscopic-analysis Nanotechnology Particle-aerodynamics Particle-counters Particle Penetration Particulate-sampling-methods Particulates Protective Clothing Quantitative-analysis Statistical-analysis Wind Tunnel

  More +
• ISSN:
  0003-4878
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  NPPTL - National Personal Protective Technology Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  55
• Issue:
  7
• NIOSHTIC Number:
  nn:20039349
• Citation:
  Ann Occup Hyg 2011 Aug; 55(7):784-796
• Contact Point Address:
  Pengfei Gao, National Institute for Occupational Safety and Health, National Personal Protective Technology Laboratory, 626 Cochrans Mill Road, Pittsburgh, PA 15236, USA
• Email:
  PGao@cdc.gov
• Federal Fiscal Year:
  2011
• NORA Priority Area:
  Manufacturing ; Public Safety
• Peer Reviewed:
  True
• Source Full Name:
  Annals of Occupational Hygiene
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:233672d64bf899f7cbcc3aee3cd97c3e170b44e869e7dfe80f55e23c027a556832ad4e46564c70070d01339e228ca90857a80a7dcbfe2f8bd189e44ff85cf1a9
• Download URL:
  https://stacks.cdc.gov/view/cdc/192684/cdc_192684_DS1.pdf
• File Type:
  [PDF - 1.06 MB ]