电子烟可抽吸烟气生成速率的数值研究

NUMERICAL STUDY ON THE SMOKE GENERATION RATE OF AN E-CIGARETTE

  • 摘要: 提出了一种电子烟可抽吸烟气生成速率的数值计算模型。该模型考虑了雾化芯表面由于烟液蒸发产生的能量损失以及烟气在气流通道壁面冷凝释放出的热量。通过菲克定律得到雾化芯表面的烟液蒸发速率和气流通道壁面的烟气冷凝速率。采用该模型研究了雾化芯几何外形和加热方式对可抽吸烟气生成速率的影响。结果表明:当对加热段的所有表面加热时,圆柱形与沟槽形雾化芯可抽吸烟气生成速率相当,均高于长方体形雾化芯,然而对加热面进行优化布置后,沟槽形雾化芯对应的可抽吸烟气生成速率高于圆柱形雾化芯。本文结果可为电子烟雾化芯的优化设计提供参考。另外,本文的建模方法和结果对于其他基于加热气化的雾化器(如医用加热雾化器)的优化设计也具有参考价值。

     

    Abstract: In this study, a numerical model for calculating the smoke generation rate of e-cigarettes is proposed. The model accounts for the energy loss due to the evaporation of e-liquid on the atomizer surface and the heat released from the smoke condensation on the walls of the external airflow channel. The evaporation rate of the e-liquid on the surface of the atomizer and the condensation rate of smoke on the walls of the airflow channel are obtained through Fick's law. The effects of atomizer geometry and heating mode on the smoke generation rate are investigated with the proposed model. Results show that when all surfaces of the heating section are heated, the smoke generation rates of grooved atomizers and cylinder atomizers are comparable, both exceeding than that of cuboid atomizers. However, after optimizing the heating surface arrangement, the smoke generation rate of the grooved atomizers exceed that of cylinder atomizers. These findings provide a reference for the optimization design of e-cigarette atomizers. In addition, the modeling method and the results of this study can also serve as a reference for the optimization design of other heat-vaporization atomizers, such as medical thermal vaporizers.

     

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