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To enhance the aerodynamic performance of a single-arc forward-curved centrifugal fan, this study investigates a centrifugal fan used in the heat pump drying system of a gravure printing machine. By combining numerical simulation and orthogonal experiments, the effects of blade number, blade inlet angle, blade outlet angle, and blade effective working width on aerodynamic performance were investigated. The experiment was designed using a three-level \({L}_{9}({3}^{4})\) orthogonal table and employed computational fluid dynamics (CFD) methods to identify the optimal parameter set for the centrifugal fan to achieve maximum flow output. The orthogonal experiment results indicated that the impact of each parameter on the centrifugal fan flow rate follows this order: blade outlet angle > blade effective working width > blade inlet angle > number of blades. The parameter combination that yielded the maximum flow rate consisted of 33 blades, a blade inlet angle of 70°, a blade outlet angle of 51°, and a blade effective working width of 37 mm. The optimized centrifugal fan achieved a flow rate of approximately 0.288  \({\text{m}}^{3}/\rm{s}\) , representing an increase of about 15.9% compared to the original fan. The enhancement of flow rate significantly contributed to the optimization of the drying process.

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Optimization Study of Fan Impeller Structures for Heat Pump Drying Systems in Gravure Printing Machines

  • 会议论文

  • 发表日期：

    2025年

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  • Jiachen Zhang,
  • Hongwei Xu,
  • Dailu Guo,
  • Donghong Liu,
  • Baoguo Lu,
  • Junyan Zhao

摘要

To enhance the aerodynamic performance of a single-arc forward-curved centrifugal fan, this study investigates a centrifugal fan used in the heat pump drying system of a gravure printing machine. By combining numerical simulation and orthogonal experiments, the effects of blade number, blade inlet angle, blade outlet angle, and blade effective working width on aerodynamic performance were investigated. The experiment was designed using a three-level \({L}_{9}({3}^{4})\) orthogonal table and employed computational fluid dynamics (CFD) methods to identify the optimal parameter set for the centrifugal fan to achieve maximum flow output. The orthogonal experiment results indicated that the impact of each parameter on the centrifugal fan flow rate follows this order: blade outlet angle > blade effective working width > blade inlet angle > number of blades. The parameter combination that yielded the maximum flow rate consisted of 33 blades, a blade inlet angle of 70°, a blade outlet angle of 51°, and a blade effective working width of 37 mm. The optimized centrifugal fan achieved a flow rate of approximately 0.288  \({\text{m}}^{3}/\rm{s}\) , representing an increase of about 15.9% compared to the original fan. The enhancement of flow rate significantly contributed to the optimization of the drying process.