目的 探究颗粒分选通道内部流场特征,解决包装工程领域高能耗、低效率的行业痛点,优化通道结构设计以提升梗丝分选效率并降低能耗,为提升分选性能提供理论支撑。方法 首先,采用RNG k-ε湍流模型并结合增强壁面处理方法,对分选通道内部流场进行数值模拟。其次,通过计算流体动力学技术解析不同结构参数下分选通道内部的流场特性与压降变化。最后,应用正交试验设计方法,研究关键结构因素对流场的影响。结果 研究表明,通道结构优化对分选通道的进出口压差影响显著。将通道拐角改为130°时,流场流体进出口压差降至269.6 Pa,变动率为-35.5%,有效降低了系统能耗,但对整体流速及流场稳定性影响不大。结论 正交试验与极差分析表明,悬浮分离通道拐角是影响进出口压差的最关键结构参数。本文确定了压差最低的优化结构组合,在保证分选效果的同时可实现能耗显著降低,为分选通道的低能耗工程设计提供了重要参考。
Abstract
The work aims to investigate the internal flow field characteristics of a particle separation channel to address the industry pain points of high energy consumption and low efficiency in packaging engineering and optimize the channel structure design to improve stem separation efficiency and reduce energy consumption, and provide theoretical support for enhancing separation performance. Firstly, the RNG k-ε turbulence model combined with enhanced wall treatment was adopted to numerically simulate the internal flow field of the separation channel. Secondly, computational fluid dynamics (CFD) technology was used to analyze the flow field characteristics and pressure drop variations inside the separation channel under different structural parameters. Finally, an orthogonal experimental design method was applied to study the influence of key structural factors on the flow field. The results showed that channel structure optimization had a significant impact on the inlet and outlet pressure difference of the separation channel. When the channel corner angle was changed to 130°, the fluid pressure difference dropped to 269.6 Pa, with a variation rate of -35.5%, effectively reducing system energy consumption while having little impact on the overall flow velocity and flow field stability. Orthogonal experiments and range analysis indicate that the corner of the suspended separation channel is the most critical structural parameter affecting the pressure difference. This paper identifies the optimized structural combination with the lowest pressure difference, which can achieve significant energy consumption reduction while ensuring separation effect, providing an important reference for the low-energy engineering design of separation channels.
关键词
分选通道 /
计算流体力学 /
流场特性 /
结构优化 /
正交设计
Key words
separation channel /
computational fluid dynamics /
flow field characteristic /
structure optimization /
orthogonal design
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基金
常德烟草机械有限责任公司科技项目（k23145）; 湖南省重点研发计划项目（2020WK2032）
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