| 摘要: |
| 目的 针对烟支传递与包装平稳性差的缺点，采用计算流体动力学(CFD)方法对烟支吸附通道内部流场进行三维数值分析。方法 研究关键部位流动特性，分析流速、压力分布及湍流耗散，提出结构改进方案。结果 流场压力和流速在烟支吸附口与风机连接位置分布不合理，拐角处湍流动能高，烟支吸附口至风机位置压力损失为5 268 Pa。风机管道存在逆压梯度，产生气流漩涡，压力损失值为14 000 Pa，高于工业需求。优化模型中，风机管道包含2个拐角时，压力损失降低了7 000 Pa，烟支吸附效果提升了350%。风机管道包含一个拐角时，压力损失降低了6 200 Pa，烟支吸附效果提升了390%，通道流场分布合理性得到改善。结论 基于仿真结果，优化风机与出风口管道连接方式，通过流场分析可为烟支吸附装置的优化设计提供一定技术支持。 |
| 关键词: 烟支吸附装置 负压通道 结构优化 CFD分析 流动特性 |
| DOI：10.19554/j.cnki.1001-3563.2023.09.035 |
| 分类号:O359 |
| 基金项目:国家自然科学基金(52075153);湖南省重点研发基金(2020WK2032) |
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| Flow Field Analysis and Optimization Design of Cigarette Adsorption Unit |
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LI Xiao-ping1, SU Jie2, LI Jun-feng1, LIAO Mao-zheng1
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(1. Changde Tobacco Machinery Co., Ltd., China Tobacco Machinery Group, Hunan Changde 415000, China;2. State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, China)
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| Abstract: |
| The work aims to carry out three-dimensional numerical analysis on the internal flow field in the cigarette adsorption channel with CFD method aiming at the poor stability of cigarette transfer and packaging. The flow characteristics of key parts were studied, the flow velocity, pressure distribution and turbulent dissipation were analyzed, and the structural improvement scheme was proposed. The distribution of flow field pressure and velocity was unreasonable at the connection position between the cigarette adsorption port and the fan, the turbulent kinetic energy at the corner was large, and the pressure loss between the cigarette adsorption port and the fan was 5 268 Pa. A large adverse pressure gradient was observed in the fan pipe. Thus, airflow vortex was caused and pressure loss was 14 000 Pa, which was higher than the industrial demand. In the optimized model, when the fan pipe contained two corners, the pressure loss was reduced by 7 000 Pa and the cigarette adsorption effect was increased by 350%. When the fan pipe contained a corner, the pressure loss was reduced by 6 200 Pa, the cigarette adsorption effect was increased by 390%, and the rationality of field flow distribution channel was improved. Based on the simulation results, the connection mode between the fan and the outlet pipe is optimized, and the flow field analysis can provide technical support for the optimization design of the cigarette adsorption unit. |
| Key words: cigarette adsorption unit negative pressure channel structural optimization CFD analysis flow characteristics |
