Collection efficiency and pressure drop for a rotary-flow cyclone

O. Ramachandran, P. C. Raynor, D. Leith

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Mathematical models for predicting the pressure drop and grade collection efficiency for a rotary-flow cyclone are presented. The models are based on simplifying assumptions about the nature of gas flow through the cyclone, as well as the mixing of particles in the gas stream. Despite these simplifications, the predictions of the models are close to experimental measurements of pressure drop and grade collection efficiency, made on an industrial rotary-flow cyclone which is used as a precleaner for an oil mist collection system. Using these models, optimisation curves were developed which predicted the dimensions (radius and pitch) of an optimised rotary-flow cyclone that would yield the minimum cut diameter d50 for a given pressure drop. Optimisations were performed for one flow rate. Scaling equations were developed so that the results of this study can be used to design rotary-flow cyclones handling other flows.

Original languageEnglish (US)
Pages (from-to)631-636
Number of pages6
JournalFiltration and Separation
Issue number6
StatePublished - 1994
Externally publishedYes

Bibliographical note

Funding Information:
This was supported by a gift from the Ford Motor Company and the United Auto Workers to th e University of North Carolina


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