dc.creator | Haglund, John S. | |
dc.creator | Mcfarland, Andrew R. | |
dc.date.accessioned | 2019-06-17T17:02:18Z | |
dc.date.available | 2019-06-17T17:02:18Z | |
dc.date.issued | 2007-08-28 | |
dc.identifier.uri | https://hdl.handle.net/1969.1/176857 | |
dc.description.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. | en |
dc.language | eng | |
dc.publisher | United States. Patent and Trademark Office | |
dc.rights | Public Domain (No copyright - United States) | en |
dc.rights.uri | http://rightsstatements.org/vocab/NoC-US/1.0/ | |
dc.title | Circumferential slot virtual impactor for concentrating aerosols | en |
dc.type | Utility patent | en |
dc.format.digitalOrigin | reformatted digital | en |
dc.description.country | US | |
dc.contributor.assignee | The Texas A&M University System | |
dc.identifier.patentapplicationnumber | 10/995745 | |
dc.subject.uspcprimary | 73/863.21 | |
dc.subject.uspcother | 55/452 | |
dc.subject.uspcother | 73/28.04 | |
dc.subject.uspcother | 95/32 | |
dc.date.filed | 2004-11-22 | |
dc.publisher.digital | Texas A&M University. Libraries | |
dc.subject.cpcprimary | B01D 45/04 | |
dc.subject.cpcprimary | B01D 45/08 | |
dc.subject.cpcprimary | B07B 7/00 | |
dc.subject.cpcprimary | G01N 1/2208 | |