Analysis of the nutation and precession of the vortex core and the influence of operating parameters in a cyclone separator

doi:10.1016/j.cjche.2021.05.016

Chinese Journal of Chemical Engineering ›› 2022, Vol. 46 ›› Issue (6): 1-10.DOI: 10.1016/j.cjche.2021.05.016

Analysis of the nutation and precession of the vortex core and the influence of operating parameters in a cyclone separator

Pan Zhang¹, Guanghui Chen², Weiwen Wang², Guodong Zhang¹, Huaming Wang³

1 College of Electromechanical Engineering and Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province, Qingdao University of Science and Technology, Qingdao 266069, China;
2 College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266043, China;
3 School of Naval Architecture and Electrical Engineering, Zhejiang Ocean University, Zhoushan 316022, China

Received:2021-01-25 Revised:2021-05-25 Online:2022-07-20 Published:2022-06-28
Contact: Pan Zhang,E-mail:pan_zh@qust.edu.cn;Huaming Wang,E-mail:hmwang@zjou.edu.cn
Supported by:
Authors thank for the joint funding of a Key Research and Development Plan of Shandong Province (Public Science and Technology) (2019GSF109038), and the Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province (2019MFRSE-A01), and the National Natural Science Foundation of China (51809236).

Analysis of the nutation and precession of the vortex core and the influence of operating parameters in a cyclone separator

Pan Zhang¹, Guanghui Chen², Weiwen Wang², Guodong Zhang¹, Huaming Wang³

1 College of Electromechanical Engineering and Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province, Qingdao University of Science and Technology, Qingdao 266069, China;
2 College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266043, China;
3 School of Naval Architecture and Electrical Engineering, Zhejiang Ocean University, Zhoushan 316022, China

通讯作者: Pan Zhang,E-mail:pan_zh@qust.edu.cn;Huaming Wang,E-mail:hmwang@zjou.edu.cn
基金资助:
Authors thank for the joint funding of a Key Research and Development Plan of Shandong Province (Public Science and Technology) (2019GSF109038), and the Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province (2019MFRSE-A01), and the National Natural Science Foundation of China (51809236).

Abstract

Abstract: Vortices motion in the anisotropic turbulent flow of cyclones makes a vital impact on flow stability and collection performance. Nevertheless, there remains a lack of clarity in the overall feature of vortices motion. In this work, a numerical analysis was conducted to clarify the complex motion of the vortex core in a cyclone separator. The validity of the numerical model was demonstrated by comparing the computational results with experimental data in the literature. As revealed by the results, the vortex core not only has a precession motion about the geometrical center axis but also does a nutation motion in the axial direction. The frequencies of the precession motions show two main peaks. And the magnitudes of the precession and nutation motions have non-uniform distributions in the cyclone. Moreover, the precession-nutation motions of the vortex cores exhibit a similar fluctuant pattern to the dust ring on the separator wall. The inlet gas velocity and the inlet solid loading show vital effects on the magnitudes and frequencies of precession and nutation motion.

Key words: Cyclone separator, Precession vortex core, Nutation motion, Separation efficiency, Numerical simulation, Fluid mechanics

摘要： Vortices motion in the anisotropic turbulent flow of cyclones makes a vital impact on flow stability and collection performance. Nevertheless, there remains a lack of clarity in the overall feature of vortices motion. In this work, a numerical analysis was conducted to clarify the complex motion of the vortex core in a cyclone separator. The validity of the numerical model was demonstrated by comparing the computational results with experimental data in the literature. As revealed by the results, the vortex core not only has a precession motion about the geometrical center axis but also does a nutation motion in the axial direction. The frequencies of the precession motions show two main peaks. And the magnitudes of the precession and nutation motions have non-uniform distributions in the cyclone. Moreover, the precession-nutation motions of the vortex cores exhibit a similar fluctuant pattern to the dust ring on the separator wall. The inlet gas velocity and the inlet solid loading show vital effects on the magnitudes and frequencies of precession and nutation motion.

关键词: Cyclone separator, Precession vortex core, Nutation motion, Separation efficiency, Numerical simulation, Fluid mechanics

Pan Zhang, Guanghui Chen, Weiwen Wang, Guodong Zhang, Huaming Wang. Analysis of the nutation and precession of the vortex core and the influence of operating parameters in a cyclone separator[J]. Chinese Journal of Chemical Engineering, 2022, 46(6): 1-10.

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Analysis of the nutation and precession of the vortex core and the influence of operating parameters in a cyclone separator

Analysis of the nutation and precession of the vortex core and the influence of operating parameters in a cyclone separator

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