Design and performance of miniature cyclones for respirable aerosol sampling

Abstract

Fifteen miniature cyclone presamplers were studied, each with a different combination of one of three cone lengths, three outlet tube inside diameters, and three outlet tube outside diameters. A single simple generalized equation with one constant for each cyclone accurately represented the effects of flow rate upon cut size for all 15 and also for 3 dual inlet stainless steel cyclones. Another single simple generalized equation with one constant for each cyclone accurately represented pressure drops for all. Effects of the cyclone dimensions on the constants were small. Normalized particle sizes for all 15 plotted as a single straight line from 5% to 80% efficiency when plotted on log probability paper. These equations should be useful for accurate design and prediction of performance of miniature cyclones.

Modelling of the Pressure Drop in Tangential Inlet Cyclone Separators

“…The most popular cyclone designs are based on the studies of Stairmand (1951), Lapple (1951), Upton et al (1994), and Kim and Lee (1990). To improve cyclone performance, a number of modifications and auxiliary devices have also been proposed and investigated experimentally or empirically (see for example, Grane et al 1992;Ioza and Leith 1990;Saltzman and Hochstrasser 1983;Jo et al 2000;Yoshida et al 2001).…”

Particle Size-Selective Sampling in the Workplace: Rationale and Recommended Techniques

“…A disadvantage of the cyclone is a Jack of a fundamental theory which can predict performance. However, empirical theories are available to assist the designer (CHAN and LIPPMANN, 1977;JOHN and REISCHL, 1980;SALTZMAN and HOCHSTRASSER, 1983). Considerable data are available on the performance of the widely-used JO mm nylon cyclone.…”

Effects of Geometrical Parameters on the Pressure Drop for a Modified Cyclone Separator

“…The influence of the vortex finder size on pressure drop was investigated by many researchers [12][13][14]27]. It has been concluded that the separation performance, including separation efficiency and pressure drop, could be improved by optimizing the vortex finder size.…”