Numerical study of highly efficient centrifugal cyclones
- Authors: Murodil Madaliev, Zokhidjon Abdulkhaev, Yunusali Khusanov, Saxiba Mirzababayeva, Zebuniso Abobakirova
- Citation: Acta hydrotechnica, vol. 37, no. 67, pp. 137-151, 2024. https://doi.org/10.15292/acta.hydro.2024.08
- Abstract: Centrifugal cyclones have been developed for centuries to treat process streams, but their efficiency in removing fine dust remains below 80%. The widespread use of cyclones in various industries is the result of their simplicity in design and their reliable operation. However, the process occurring inside a cyclone is a complex scientific problem that still remains unsolved within the framework of aerohydromechanics, as evidenced by the variety of cyclone designs. The current level of cyclone cleaning's efficiency for process streams does not meet sanitary standards and significantly affects the level of environmental pollution. This paper compares various configurations of centrifugal cyclones, including cyclones without screws, with a screw of a uniform pitch, and with a screw of a variable pitch to regulate the twist of the flow. Numerical simulations were performed using the Comsol Multiphysics 5.6 software package using the SST turbulence model. The obtained numerical data show that the efficiency of a cyclone with a variable screw pitch is significantly higher than that of cyclones without screws and with a screw of a uniform pitch.
- Keywords: Cyclone, mathematical modeling, turbulence models, Reynolds-averaged Navier–Stokes equations.
- Full text: a37mm.pdf
- References:
- Agullo, E., Giraud, L., Guermouche, A., Haidar, A., Roman, J. (2013). Parallel algebraic domain decomposition solver for the solution of augmented systems. Adv. Eng. Softw. 60, 23–30. https://doi.org/10.1016/j.advengsoft.2012.07.004.
- Avci, A., Karagoz, I. (2003). Effects of flow and geometrical parameters on the collection efficiency in cyclone separators. J. Aerosol Sci. 34(7), 937–955. https://doi.org/10.1016/S0021-8502(03)00054-5.
- Brar, L. S., Sharma, R. P., Dwivedi, R. (2015). Effect of vortex finder diameter on flow field and collection efficiency of cyclone separators. Part. Sci. Technol. 33(1), 34–40. https://doi.org/10.1080/02726351.2014.933144.
- Chuah, T. G., Gimbun, J., Choong, T. S. Y. (2006). A CFD study of the effect of cone dimensions on sampling aerocyclones performance and hydrodynamics. Powder Technol. 162(2), 126–132. https://doi.org/10.1016/j.powtec.2005.12.010.
- “COMSOL Modeling Software”. COMSOL.com. Comsol, Inc. Retrieved [WWW Document] (2015).
- Hoekstra, A. J. (2000). Gas flow field and collection efficiency of cyclone separators. TU Delft, Ph. D. Thesis, Delft Univ. Technol.
- Hoffmann, A. C., De Groot, M., Peng, W., Dries, H. W. A., Kater, J. (2001). Advantages and risks in increasing cyclone separator length. AIChE J. 47(11), 2452–2460. https://doi.org/10.1002/aic.690471109.
- Hsu, C.-W., Huang, S.-H., Lin, C.-W., Hsiao, T.-C., Lin, W.-Y., Chen, C.-C. (2014). An experimental study on performance improvement of the stairmand cyclone design. Aerosol Air Qual. Res. 14(3), 1003–1016. https://doi.org/10.4209/aaqr.2013.04.0129.
- Kuzmin, D., Löhner, R., Turek, S. (2012). Flux-corrected transport: principles, algorithms, and applications. Springer Science & Business Media.
- Lee, J. W., Yang, H. J., Lee, D. Y. (2006). Effect of the cylinder shape of a long-coned cyclone on the stable flow-field establishment. Powder Technol. 165(1), 30–38. https://doi.org/10.1016/j.powtec.2006.03.011.
- Malikov, Z. M., Madaliev, M. E. (2020). Numerical Simulation of Two-Phase Flow in a Centrifugal Separator. Fluid Dyn. 55(8), 1012–1028. https://doi.org/10.1134/S0015462820080066.
- Menter, F. R. (1994). Two-equation eddy-viscosity turbulence models for engineering applications. AIAA J. 32(8), 1598–1605. https://doi.org/10.2514/3.12149.
- Smirnov, P. E., Menter, F. R. (2009). Sensitization of the SST turbulence model to rotation and curvature by applying the Spalart–Shur correction term. J. Turbomach. 131(4): 041010. https://doi.org/10.1115/1.3070573.
- Son, E., Murodil, M. (2020). Numerical calculation of an air centrifugal separator based on the SARC turbulence model. J. Appl. Comput. Mech. 6(Special Issue), 1133–1140. https://doi.org/10.22055/jacm.2020.31423.1871.
- Spalart, P. R., Rumsey, C. L. (2007). Effective inflow conditions for turbulence models in aerodynamic calculations. AIAA J. 45(10), 2544–2553. https://doi.org/10.2514/1.29373.
- Surmen, A., Avci, A., Karamangil, M. I. (2011). Prediction of the maximum-efficiency cyclone length for a cyclone with a tangential entry. Powder Technol. 207(1–3), 1–8. https://doi.org/10.1016/j.powtec.2010.10.002.
- Wei, J., Zhang, H., Wang, Y., Wen, Z., Yao, B., Dong, J. (2017). The gas-solid flow characteristics of cyclones. Powder Technol. 308, 178–192. https://doi.org/10.1016/j.powtec.2016.11.044.
- Xiang, R. B., Lee, K. W. (2005). Numerical study of flow field in cyclones of different height. Chem. Eng. Process. Process Intensif. 44(8), 877–883. https://doi.org/10.1016/j.cep.2004.09.006.
- Zhu, Y., Lee, K. W. (1999). Experimental study on small cyclones operating at high flowrates. J. Aerosol Sci. 30(10), 1303–1315. https://doi.org/10.1016/S0021-8502(99)00024-5.
- Zlochevsky, V. L., Mukhopad, K. A. (2015). Analysis of air flow formation in a cyclone. South Siberian Scientific Bulletin (4), 5–13.
- Kuznetsov, S. I., Mikhailik, V. D., Rusanov, S. A. (2009). Modeling the operation of a highly efficient cyclone-rotary dust collector. Bulletin of Kherson National Technical University (3), 36.
- Tarasova, L. A. (2010). Improving the technological efficiency of vortex-type devices in gas cleaning systems (Doctoral dissertation, Moscow State University of Environmental Engineering).