| 刘跃， 常玲玲， 管小荣.方形铝箔碎屑收集管数值优化设计[J].轻工机械,2021,39(4):98-103 |
| 方形铝箔碎屑收集管数值优化设计 |
| foil scrap；square pipe；negative pressure；pipe flow；CFD（Computational Fluid Dynamics） |
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| DOI：10.3969/j.issn.1005 2895.2021.04.019 |
| 中文关键词: 铝箔碎屑 方管 负压 管路流场 计算流体力学 |
| 英文关键词:Numerical Optimization of Square Pipe for Foil Scrap Collection |
| 基金项目:陕西省自然科学基金青年基金项目（2021JQ 898）；陕西省教育厅专项科研计划项目（20JK0508）。 |
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| 中文摘要: |
| 为了解决铝箔剪切机工作中存在的碎屑收集难题，课题组使用CFD方法计算了不同设计结构时的管路流场，在深入分析挡板布置及支管至出口距离设置对双支管吸力影响规律的基础上，重点探讨了不同压力 速度耦合分布现象出现的原因，并给出管路优化建议。数值模拟结果表明：2个支管前设置挡板时，第2个挡板会阻碍第1个支管后部气流运动，形成较大低速涡流区，无法形成负压及吸力；当2个支管使用连通挡板时，可以产生负压及吸力，但由于支管至出口距离不一致导致速度差异达62.24%；2个支管至出口距离相同时，在支管口形成均匀负压及吸力，可满足工业需求。此外，支管与主管倒圆角设置时对气流有良好的“导向”作用，支管速度可提高6%左右。 |
| 英文摘要: |
| To avoid the foil scrap collection problem during the routine work of the foil slitter, the pipeline flow field with different designed structures was calculated by using CFD method, the reasons of different pressure velocity coupling distribution were discussed in details on the basis of in depth analysis of the impacts of the baffle structures and the distance between the branch pipe and the outlet on the suction of the double branch pipe, and suggestions for pipeline optimization were proposed. The numerical results show that when baffles are set in front of the two branch pipes, the second baffle will block the air flow at the rear of the first branch pipe, forming an obvious recirculation zone with low velocity, amd the negative pressure and suction cannot be formed. Negative pressure and suction can be generated when using connected baffles between the two branches, however, the velocity discrepancy value reaches to 62.24 percent due to the inconsistent distance between the branch pipe and outlet. The uniform pressure and suction will be formed when the distance between two branche pipes and outlet is the same, which can meet the industrial requirements. Additionally, it has good guidance effort when using fillet method between the branch pipe and main pipe, and the velocity of branch pipe can be increased by nearly 6 percent. |
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