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<p>This paper investigated the influence of both deflector angle <i>θ</i><sub>1</sub> and cutting teeth arrangement angle <i>θ</i><sub>2</sub> on the aeration performance of a cyclone aerator by using the CFD-PBM coupling model. The aeration performance of the cyclone aerator is evaluated by the proposed bubble breakage rate <i>η</i>. Specifically, five different <i>θ</i><sub>1</sub> values (30°, 45°, 60°, 75°, and 90°) and five different <i>θ</i><sub>2</sub> values (6°, 12°, 18°, 24°, and 30°) are selected. Thus, two factors with five levels result in 25 simulation cases. Meanwhile, two-factor variance analysis is performed with SPSS software; as a result, both the intersubject factor and the results of the intersubject effect testing are analyzed. The simulation results show that the cyclone aerator has a maximum <i>η</i> in the cases of <i>θ</i><sub>1</sub> = 90° and <i>θ</i><sub>2</sub> = 30°. Furthermore, <i>η</i> of the optimal cyclone aerator structure model with <i>θ</i><sub>1</sub> = 90° and <i>θ</i><sub>2</sub> = 30° is increased by 12.5% compared with that of the original model. To verify the correctness of the simulated results, clear water aeration and oxygenation experiments were performed by analyzing <i>K</i><sub>Las</sub> and SOTR. The experimental results show that compared with the original model, the <i>K</i><sub>Las</sub> of the optimal cyclone aerator structure model is increased by 27.1%, while the SOTR of the optimal cyclone aerator structure model is increased by 27.7%. Additionally, after using ImageJ software to deal with the experimental images, it is clear that the optimized cyclone aerator has smaller and denser bubbles. Therefore, the aeration performance of the cyclone aerator can be largely improved in the cases of the optimal <i>η</i><sub>1</sub> = 90° and <i>η</i><sub>2</sub> = 30°.</p>

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Clarification of the influence of both deflector angle θ1 and cutting teeth arrangement angle θ2 on the aeration performance of the cyclone aerator

  • 期刊论文

  • 发表日期：

    2026年5月6日

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  • Tong Zhao,
  • Keke Xu,
  • Zhilong Wang,
  • Bo Sun,
  • Chaofan Pang,
  • Yosephus Ardean Kurnianto Prayitno

摘要

This paper investigated the influence of both deflector angle θ1 and cutting teeth arrangement angle θ2 on the aeration performance of a cyclone aerator by using the CFD-PBM coupling model. The aeration performance of the cyclone aerator is evaluated by the proposed bubble breakage rate η. Specifically, five different θ1 values (30°, 45°, 60°, 75°, and 90°) and five different θ2 values (6°, 12°, 18°, 24°, and 30°) are selected. Thus, two factors with five levels result in 25 simulation cases. Meanwhile, two-factor variance analysis is performed with SPSS software; as a result, both the intersubject factor and the results of the intersubject effect testing are analyzed. The simulation results show that the cyclone aerator has a maximum η in the cases of θ1 = 90° and θ2 = 30°. Furthermore, η of the optimal cyclone aerator structure model with θ1 = 90° and θ2 = 30° is increased by 12.5% compared with that of the original model. To verify the correctness of the simulated results, clear water aeration and oxygenation experiments were performed by analyzing KLas and SOTR. The experimental results show that compared with the original model, the KLas of the optimal cyclone aerator structure model is increased by 27.1%, while the SOTR of the optimal cyclone aerator structure model is increased by 27.7%. Additionally, after using ImageJ software to deal with the experimental images, it is clear that the optimized cyclone aerator has smaller and denser bubbles. Therefore, the aeration performance of the cyclone aerator can be largely improved in the cases of the optimal η1 = 90° and η2 = 30°.