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    Circumferential slot virtual impactor for concentrating aerosols

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    7261007.pdf (1.215Mb)
    Date
    2007-08-28
    Author
    Haglund, John S.
    Mcfarland, Andrew R.
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    Abstract
    A circumferential slot virtual impactor includes a disk-shaped housing with an endless circumferential slot for receiving aerosols. The slot forms an acceleration nozzle, and a receiver nozzle spaced apart radially inwardly from the acceleration nozzle exit. In an annular gap between the two nozzles, negative pressure is selectively applied to draw a major flow of the aerosol axially away from the nozzles, while a minor flow of the aerosol is drawn radially inward and enters the receiver nozzle. A portion of the larger particles leaves the major flow and merges with the minor flow due to particle momentum, thus increasing the large-particle concentration of the minor flow. The acceleration nozzle incorporates convex curvature along its opposed interior surfaces, for a smoother aerosol flow and reduced large-particle deposition.
    URI
    https://hdl.handle.net/1969.1/176857
    Subject
    73/863.21
    55/452
    73/28.04
    95/32
    B01D 45/04
    B01D 45/08
    B07B 7/00
    G01N 1/2208
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    • Texas A&M University Patents
    Citation
    Haglund, John S.; Mcfarland, Andrew R. (2007). Circumferential slot virtual impactor for concentrating aerosols. United States. Patent and Trademark Office; Texas A&M University. Libraries. Available electronically from https : / /hdl .handle .net /1969 .1 /176857.

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