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Effect of blade tilt angle on fluid flow characteristics in spray-blowing agitation composite process: a simulation

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Abstract

Aiming at the paddle tilt angle of the spray-blowing agitation composite process, the four-blade stirring and blowing composite desulfurization agitator was chosen as the research object, and the computational fluid dynamics numerical simulation was used to investigate the changes in flow field velocity, turbulent kinetic energy magnitude, and distribution caused by the blade tilt angle. Furthermore, the impact of blade tilt angle on the flow fragmentation behavior of individual bubbles and the coalescence process of multiple bubbles at different positions was studied. Under the same stirring and blowing process parameters, with the increase in the blade tilt angle of the agitator, the velocity of the flow field and the average turbulent kinetic energy inside the agitator decreased, and the bubble fragmentation speed decreased while the merging speed accelerated. The turbulent kinetic energy at the agitator bottom was greater when the blade tilt angle was 3.2° compared to when it was 13.2°, while the turbulent kinetic energy at the agitator upper part was relatively smaller. The results for single bubbles represented the state and trajectory of the bubble fragmentation process, and the results for multiple bubbles illustrated the state and trajectory of the bubble aggregation process.

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (No. 51904069), the Fundamental Research Funds for the Central Universities (No. N2223026), the Development Fund of State Key Laboratory for Clean Utilization of Complex Nonferrous Metal Resources (No. CNMRCUKF2302), and the Scientific Research Fund Project of Northeastern University at Qinhuangdao (No. XNY201808).

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Authors and Affiliations

  1. School of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao, 066000, Hebei, China

    Chao Lv, Hai-wei Zhang, Tao Yang & Zhao-xiang Ji

  2. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China

    Chao Lv

  3. School of Metallurgy and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Hong-liang Zhao

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  1. Chao Lv
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  2. Hai-wei Zhang
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Correspondence to Chao Lv or Hong-liang Zhao.

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Lv, C., Zhang, Hw., Yang, T. et al. Effect of blade tilt angle on fluid flow characteristics in spray-blowing agitation composite process: a simulation. J. Iron Steel Res. Int. (2024). https://doi.org/10.1007/s42243-024-01204-7

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  • DOI: https://doi.org/10.1007/s42243-024-01204-7

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