Collection Efficiency of Rectangular Slit-Nozzle Inertial Impactors with Impaction Plates of Elliptical Concave Curvature
- Authors
- Kim, Won-Geun; Yook, Se-Jin; Ahn, Kang-Ho
- Issue Date
- Jan-2013
- Publisher
- Taylor & Francis
- Citation
- Aerosol Science and Technology, v.47, no.1, pp.99 - 105
- Indexed
- SCIE
SCOPUS
- Journal Title
- Aerosol Science and Technology
- Volume
- 47
- Number
- 1
- Start Page
- 99
- End Page
- 105
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/28908
- DOI
- 10.1080/02786826.2012.730162
- ISSN
- 0278-6826
- Abstract
- In this study, the impaction plate with an elliptical concave groove was employed in an effort to enhance the collection efficiency of the slit-nozzle inertial impactor. The major axis length (A) and the minor axis length (B) of the elliptical concave curvature were varied. The effect of the ratio of A to B on the collection efficiency of slit-nozzle inertial impactors was investigated both numerically and experimentally. The numerical results were in good agreement with the experimental data for different values of A/B ratio. The elliptical concave impaction plates were useful in not only reducing the particle bounce but also lowering the cut-off size. The optimum range of the A/B ratio was found to exist for minimizing the cut-off size. When the elliptical concave impaction plates with the A/B ratio of 2 were used for the slit-nozzle inertial impactors, the square-root of the Stokes number was estimated to be lowered from 0.77 to approximately 0.6, resulting in the decrease of the cut-off size by 22% compared with the typical flat impaction plates.
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