In-Line Impactor Inlet for Bioaerosol Sampling
| Autor: | Kyle W. Richardson, Michael M. Baehl, Philip M. Poeschl, Shishan Hu, Andrew R. McFarland |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Aerosol Science and Technology. 45:701-711 |
| ISSN: | 1521-7388 0278-6826 |
| DOI: | 10.1080/02786826.2011.553249 |
| Popis: | The proof of concept of a novel in-line real impactor (IRI) for preseparation of large particles in ambient inlets was demonstrated with a 1,250 L/min design. Numerical simulations predicted a cutpoint Stokes number 0.3 for a ratio of jet-to-plate spacing to jet width (S/W) of 2.0 and 0.5 for a ratio of 4.0. This variation in cutpoint Stokes number allows minor adjustments in cutpoint for a given device size. Experimental benchmark tests support the prediction of a shift in cutpoint with S/W. Inlet systems with flow rates of 100 and 400 L/min were designed by Stokes scaling of the 1,250 L/min IRI and integrating the lower flow devices with an existing inlet aspiration section and an insect screen. Experiments with the inlet system were conducted in a wind tunnel with particles from 3 to 20 μm aerodynamic diameter (AD) and wind speeds of 2, 8, and 24 km/h. A nominal cutpoint of approximately 11 μm AD was selected to accommodate bioaerosol sampling needs, and the wind tunnel results showed the average cutpo... |
| Databáze: | OpenAIRE |
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