基于烟芯段和滤嘴段耦合的加热卷烟烟气关键成分释放模型构建
Modeling the release of key components of heated cigarette smoke based on the coupling of tobacco section and filter section
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摘要: 为揭示加热卷烟抽吸过程中的传质机理,通过构建加热卷烟烟气关键成分的烟芯段释放动力学模型和滤嘴段逐口截留模型,建立了加热卷烟中丙二醇、丙三醇和烟碱的传质模型,并采用 COMSOL Multiphysics软件对模型进行数值求解,对烟支逐口抽吸过程中烟芯段和滤嘴段丙二醇、丙三醇、烟碱的含量及浓度场进行模拟。 结果表明:模拟得到的加热卷烟逐口抽吸过程中烟芯段丙二醇、丙三醇、烟碱剩余量与实验值较为吻合,建立的动力学模型可较好地反映加热卷烟 3 种关键成分的释放机理;烟气丙二醇、丙三醇、烟碱出口释放量与实验值较为吻合,建立的截留模型可较好地反映逐口抽吸过程中滤嘴段对烟气 3 种关键成分的截留机理;抽吸时烟芯段外壁较加热片附近固相物质传质效率低;随着抽吸口数的增加,烟气中丙二醇、丙三醇、烟碱的质量浓度在烟芯和滤嘴段呈动态变化,其中滤嘴段的质量浓度先升后降,烟芯段的质量浓度则从第 2口开始减少;单口抽吸过程中,烟芯段和滤嘴段烟气丙二醇、丙三醇、烟碱的质量浓度随着气流速度的变化而发生动态变化。Abstract: To reveal the mass transfer mechanisms of heated cigarettes during puffing, we constructed dynamic models for the release kinetics of the cigarette core segment and mouthpiece retention segment, establishing a mass transfer model for key components of heated cigarettes. Using COMSOL Multiphysics software, we numerically solved the model to simulate the content and concentration fields of core and mouthpiece segments during each puffingcycle. Results indicated that the simulated residual amount of core segment key components during puffing closely matched experimental values, validating the dynamic model′s ability to reflect the release mechanisms of heated cigarette components. The simulated outlet release of gas phase components closely matched experimental values, validating the retention model′s ability to reflect the mouthpiece′s retention mechanism of gas phase componentsduring each puff. During puffing, the transfer efficiency of solid-phase materials near the heating element on the core segment′s outer wall was low. With increasing puffs, the concentrations of the three key components in the gas phase varied dynamically in the core and mouthpiece segments, with concentrations in the mouthpiece segment initially rising and then declining, while those in the core segment decreased from the second puff onwards. During single puffing, the concentrations of gas phase key components in the core and mouthpiece segments dynamically changed with variations in airflow velocity.
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Key words:
- heated cigarette /
- key component /
- mass transfer model /
- retention model /
- numerical simulation
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