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LES OF SWIRLING FLOW IN SEPARATION DEVICES

Jos Derksen
Kramers Laboratorium voor Fysische Technologie Delft University of Technology Prins Bernhardlaan 6, 2628 BW Delft, The Netherlands

Resumo

Large-eddy simulations (LES) of confined swirling flow with applications in cyclone separators are presented. First, the quality of the LES is assessed by means of experimental data obtained by Escudier et al. (1980) of the flow in a swirl-tube-geometry. Results with three subgrid-scale models, and three spatial resolutions will be compared. Consecutively, the turbulent flow in a cyclone separator used in industrial practice (a Stairmand high-efficiency cyclone) has been simulated. Good agreement in terms of the time-averaged flow, and in terms of the flow's dynamic behavior was obtained. Finally, the applicability of the LES flow field for performing particle separation calculations is demonstrated.