Towards a new method for experimental determination of aerosol sampler aspiration efficiency in small wind tunnels

Gurumurthy Ramachandran, Avula Sreenath, James H. Vincent

Research output: Contribution to journalArticle

Abstract

To test the performance of aerosol samplers, a new method is proposed which uses scaling relationships and existing empirical equations for aspiration efficiency. The method may be used to prescribe experimental conditions and small-scale sampler designs that can be tested in small wind tunnels that are physically equivalent to testing full-scale samplers in large wind tunnels. The basic assumptions which underlie the measurement of aerosol sampler performance and the quantitative effects of errors arising from spatial and temporal non-uniformities in aerosol distributions are examined. Aspiration efficiency is strongly dependent on the spatial distributions of air velocity and particle concentration far upstream of the sampler.

Original languageEnglish (US)
Pages (from-to)875-891
Number of pages17
JournalJournal of Aerosol Science
Volume29
Issue number7
DOIs
StatePublished - Aug 1 1998
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Engineering
  • Pollution
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes
  • Atmospheric Science

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