普通醋纤香烟滤嘴内温度及烟碱分布模拟

Simulation of Nicotine and Temperature Distribution in Acetate Fiber Cigarette Filter Tip

为减少香烟抽吸过程中烟碱对人体健康的危害,在ISO抽吸模式下,采用标准k-ε湍流模型、SIMPLE算法和多孔介质模型对普通醋纤香烟滤嘴内烟气温度与烟碱截留规律进行研究.结果表明,抽吸过程中烟气总焓随时间逐渐降低;烟碱在轴向上迁移速度快,但随着向吸食端扩散,烟碱温度逐渐降低,速度减慢,截留量也不断减少;径向上烟碱在热泳力作用下,布朗无规则运动加剧,烟碱在每一截面上分布较分散,烟碱截留效率降低.普通醋纤香烟滤嘴的烟碱模拟截留效率为30.59%,与相同实验条件下测得的效率接近.研究结果为滤嘴的优化设计提供理论依据.

In order to reduce the harm of the nicotine to human body during the suction, the distribu- tion of nicotine interception and flue gas temperature in the cellulose acetate cigarette filter under ISO suc- tion mode was simulated via the standard κ-ε turbulence model, SIMPLE algorithm and porous medium model. The results showed that the total enthalpy of air decreased gradually with the time, and the nico- tine spread quickly and decreased gradually along the axial direction, because nicotine temperature gradual- ly decreased and nicotine slowly moved down when spreading to the smoking end. Moreover, the nicotine also distributed discretely, which reduced the nicotine intercept efficiency because of the fierce Brownian motion under thermophoretic force along the radial direction. Meanwhile, it is found that the simulation intercept efficiency of cellulose acetate cigarette filter was 30. 59 ~, which was close to the experimental ef- ficiency under the same conditions, and the results can provide theoretical basis for the optimal design ofthe filter.