Abstract
Abstract
The separation of submicrometre particulate matter from gases is a problem that has attracted much interest over the years. Filter systems require low face velocities and hence tend to be of large size, while also requiring sophisticated, bulky, regeneration systems. A high-speed centrifuge which can be linked with a turbocharger has been developed which can remove particulates well into the submicrometre range in diameter. The centrifuge operates at speeds of up to 60 000 r/min, with the assistance of both axial thrust air bearings and radial foil bearings.
Experimental analysis of the centrifuge using particle sizing techniques etc. has shown the effectiveness of the system operating at a range of different flowrates. This has been done by comparing the relative effectiveness of the system for the different flowrates.
The paper discusses the analysis of the separative efficiency (i.e. the ability to concentrate particles into a small proportion of the gas) of the present system and the predicted efficiencies of future systems.
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