The effect of cylinder wall cooling and vortex finder (tapered in-out) geometry on temperature, heat rate, and flow field to increase cyclone performance using CFD

Abstract

The results of testing the effect of temperature, flow field, heat transfer, and performance by simulating the tapered in-out shape with and without cylinder wall cooling (17 °C). The tapered in-out height variations used in this study are 0.5, 0.75, 1, and 1.25D with diameters De 74 and Dc 148. The fluid flow simulation used the RSM turbulence model. The particle movement approach is predicted using Eulerian-Lagrangian. The DPM method was applied to track the flow trajectories of individual particles. A model with cooling is applied to the cyclone body assuming constant temperature. The validation results of experimental and CFD simulation show the same trend with an error of 5.5%. Simulation results show that changing the shape of the vortex finder from the conventional cyclone (V0) to tapered in-out (V1) results in a significant improvement in performance: particle efficiency of 18.11% and pressure drop of 59.46%. The tapered in-out with cylinder wall cooling (V1C) slightly affects the performance: 1.9% increase in particle efficiency and 8.23% increase in pressure drop compared to the tapered in-out (V1). The change in height of V1 to V4 and V1C to V4C causes the performance on particle efficiency to decrease by 31.41% and 30.67% pressure drop decreases with increasing height of tapered in-out.

Keywords

• Vortex finder
• Cooling
• Heat transfer
• Pressure drop
• Particle efficiency
• Temperature