Ring slit centrifuge (Engineering Materials)
10 drawings. The design and the performance of a modified centrifuge which has an aerosol inlet in the form of a ring slit is described. The modification was conceived to facilitate high aerosol sampling rates at reasonable size resolutions in terms of aerodynamic diameters. In the size range between 4 x 10/sup -4/ and 1.3 x 10/sup -5/ cm., the instrument permits sampling rates of 1 liter per minute or more at a size resolution of better than 7%. In any single test run, a size range of about one onder of magnitude can be resolved. These results seem to be close to the optimum performance data expected from theoretical considerations. For the size range between 1.3 x 10/sup -5/ and 6 x 10/sup -6/ cm., the sampling rate fell short of theoretical expectations and had to be reduced to about 0.1 liter per minute in order to give acceptable results. This rate is comparable with maximum sampling rates of other conifuge designs. It seems to be an upper limit at high rotor speeds and low linear flow velocities for conifuge versions with aerosol entrainment under tangential accelerating forces. (auth)
- Research Organization:
- Rochester Univ., N.Y. (USA)
- NSA Number:
- NSA-29-018267
- OSTI ID:
- 4345257
- Report Number(s):
- CAPE-2385
- Resource Relation:
- Other Information: 10 drawings. Orig. Receipt Date: 30-JUN-74
- Country of Publication:
- United States
- Language:
- English
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