Opposed-flow virtual cyclone for particle concentration
Abstract
An opposed-flow virtual cyclone for aerosol collation which can accurately collect, classify, and concentrate (enrich) particles in a specific size range. The opposed-flow virtual cyclone is a variation on the virtual cyclone and has its inherent advantages (no-impact particle separation in a simple geometry), while providing a more robust design for concentrating particles in a flow-through type system. The opposed-flow virtual cyclone consists of two geometrically similar virtual cyclones arranged such that their inlet jets are inwardly directed and symmetrically opposed relative to a plane of symmetry located between the two inlet slits. A top plate bounds both jets on the "top" side of the inlets, while the other or lower wall curves "down" and away from each inlet jet. Each inlet jet will follow the adjacent lower wall as it turns away, and that particles will be transferred away from the wall and towards the symmetry plane by centrifugal action. After turning, the two jets merge smoothly along the symmetry line and flow parallel to it through the throat. Particles are transferred from the main flows, across a dividing streamline, and into a central recirculating region, where particle concentrations become greatly increased relative to the main stream.
- Inventors:
-
- Lafayette, CA
- Albuquerque, NM
- Issue Date:
- Research Org.:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- OSTI Identifier:
- 873422
- Patent Number(s):
- 6156212
- Application Number:
- 09/244,259
- Assignee:
- Sandia Corporation (Livermore, CA)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- opposed-flow; virtual; cyclone; particle; concentration; aerosol; collation; accurately; collect; classify; concentrate; enrich; particles; specific; size; range; variation; inherent; advantages; no-impact; separation; simple; geometry; providing; robust; design; concentrating; flow-through; type; consists; geometrically; similar; cyclones; arranged; inlet; jets; inwardly; directed; symmetrically; opposed; relative; plane; symmetry; located; slits; top; plate; bounds; inlets; wall; curves; jet; follow; adjacent; transferred; towards; centrifugal; action; merge; smoothly; line; flow; parallel; throat; main; flows; dividing; streamline; central; recirculating; region; concentrations; greatly; increased; stream; virtual cyclone; size range; particle concentration; greatly increased; top plate; particle separation; opposed-flow virtual; inwardly directed; greatly increase; concentrating particles; /210/55/73/209/356/
Citation Formats
Rader, Daniel J, and Torczynski, John R. Opposed-flow virtual cyclone for particle concentration. United States: N. p., 2000.
Web.
Rader, Daniel J, & Torczynski, John R. Opposed-flow virtual cyclone for particle concentration. United States.
Rader, Daniel J, and Torczynski, John R. Tue .
"Opposed-flow virtual cyclone for particle concentration". United States. https://www.osti.gov/servlets/purl/873422.
@article{osti_873422,
title = {Opposed-flow virtual cyclone for particle concentration},
author = {Rader, Daniel J and Torczynski, John R},
abstractNote = {An opposed-flow virtual cyclone for aerosol collation which can accurately collect, classify, and concentrate (enrich) particles in a specific size range. The opposed-flow virtual cyclone is a variation on the virtual cyclone and has its inherent advantages (no-impact particle separation in a simple geometry), while providing a more robust design for concentrating particles in a flow-through type system. The opposed-flow virtual cyclone consists of two geometrically similar virtual cyclones arranged such that their inlet jets are inwardly directed and symmetrically opposed relative to a plane of symmetry located between the two inlet slits. A top plate bounds both jets on the "top" side of the inlets, while the other or lower wall curves "down" and away from each inlet jet. Each inlet jet will follow the adjacent lower wall as it turns away, and that particles will be transferred away from the wall and towards the symmetry plane by centrifugal action. After turning, the two jets merge smoothly along the symmetry line and flow parallel to it through the throat. Particles are transferred from the main flows, across a dividing streamline, and into a central recirculating region, where particle concentrations become greatly increased relative to the main stream.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 05 00:00:00 EST 2000},
month = {Tue Dec 05 00:00:00 EST 2000}
}