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Characteristics of the collection efficiency for a cyclone with different vortex finder shapes

2004; Elsevier BV; Volume: 35; Issue: 6 Linguagem: Inglês

10.1016/j.jaerosci.2003.12.002

1879-1964

K.S. Lim, H.S. Kim, K.W. Lee,

Spacecraft and Cryogenic Technologies

The performance of a cyclone, with different vortex finders, was evaluated to examine the effect of the vortex finder shape on the characteristics of the collection efficiency. Four cylinder-shaped and six cone-shaped vortex finders were designed and employed to compare the collection efficiencies of the cyclone, at flow rates of 30 and 50l/min. The cylinder-shaped-vortex finders had different diameters, i.e. 15, 11 and 7mm, and the cone-shaped vortex finders had different cone lengths, i.e. 10, 25 and 45mm, with 7 and 15mm diameters at both ends of the cone. The collection efficiencies of the cone-shaped vortex finders were found to only be slight different, regardless of the cone length, which were higher than that of the cylinder-shaped vortex finder with a 15mm diameter, but lower than that of cylinder-shaped vortex finder with a 7mm diameter. This result indicates that two cone-shaped vortex finders, with different diameters, had the collection efficiencies between those of the cylinder-shaped vortex finders with the same diameter, and that a smaller pressure drop per flow rate unit could be achieved for the cone-shaped design, but the cone length did not affect the collection efficiency and pressure drop of the cyclone.