电子烟多口抽吸过程的传热传质数值模拟  

Numerical simulation on heat and mass transfer during multiple puffing in e-cigarette

作　　者：黄忠辉[1] 黄洁洁 高峄涵 李典[1] 高乃平[2] 陆漓 王萍娟[1] 巫毅 HUANG Zhonghui;HUANG Jiejie;GAO Yihan;LI Dian;GAO Naiping;LU Li;WANG Pingjuan;WU Yi(Technology Center,China Tobacco Guangxi Industrial Co.,Ltd.,Nanning 530001,China;School of Mechanical Engineering,Tongji University,Shanghai 200092,China;Shanghai New Tobacco Product Research Institute,Shanghai 201315,China;Liuzhou Cigarette Factory,China Tobacco Guangxi Industrial Co.,Ltd.,Liuzhou 545026,Guangxi,China)

机构地区：[1]广西中烟工业有限责任公司技术中心,广西南宁市530001 [2]同济大学机械与能源工程学院,上海市200092 [3]上海新型烟草制品研究院有限公司,上海市201315 [4]广西中烟工业有限责任公司柳州卷烟厂,广西柳州市545026

出　　处：《烟草科技》2023年第1期74-81,共8页Tobacco Science & Technology

基　　金：国家烟草专卖局科技重大专项“基于多孔介质界面效应的雾化机理研究及应用”[110202001009(XX-05)];广西中烟工业有限责任公司产学研项目“多孔介质中雾化剂雾化过程传质传热的模拟研究”(GXZYCX2021C006);“加热不燃烧烟支中的水分迁移规律及水分对烟气影响的研究”(GXZYCX2020C003)。

摘　　要：为探究电子烟烟液在多孔雾化芯内雾化过程中的传热传质行为,建立了适用于模拟电子烟多口抽吸使用场景的多口抽吸模型,并应用MATLAB软件对模型进行求解,经验证模型具有一定的准确性。利用多口抽吸模型模拟逐口抽吸条件下电子烟烟液相变过程的传热传质特性、烟液成分变化并计算热效率。结果表明:(1)雾化芯孔隙中的烟液在抽吸间隙发生降温,在30 s的抽吸间隙内,烟液温度无法降至环境温度,随着抽吸口数的增加,逐口抽吸开始时刻和结束时刻的烟液温度较上一口相比平均提高4.4%;(2)在模拟的5口抽吸中,烟液的平均气化速率呈现先增大后减小的趋势,第2口抽吸时烟液的平均气化速率达到最大值2.80 mg/s;(3)随着抽吸口序的增大,逐口的系统升温耗能呈现先减小后增大的趋势,逐口的烟液气化耗能呈现先增大后减小的趋势,逐口的导热、对流、辐射3项热损失不断增大,每一口抽吸的热损失较上一口分别平均提高8.4%、6.8%、11.6%。每口抽吸的热效率随抽吸口数的增加而减小,当抽吸口数从1口增加至5口,每口抽吸的热效率从93.3%降至90.9%。To investigate the heat and mass transfer behaviors in the atomization process of e-liquid in a porous atomizer,a multi-puffing model was developed to simulate e-cigarette aerosolization process.The model was solved by using MATLAB software and its accuracy was verified.The multi-puffing model was used to simulate the heat and mass transfer characteristics and e-liquid composition variation in the phase change process of e-liquid,and the thermal efficiency of this phase transformation was calculated.The results showed that:1)The e-liquid in the micro-pores of a porous atomizer was cooled down between the puffing intervals.However the temperature did not reduce to the ambient temperature within the interval of 30 sec.With the proceeding puffs,the temperature of the e-liquid at the beginning and end of the subsequent puff raised by 4.4%on average comparing with the previous puff.2)For the 5consecutive puffs simulated,the average vaporization mass rate of the e-liquid increased first and then decreased,peaking at the second puff with the maximum value of 2.80 mg/s.3)With the proceeding puffs,the puff-by-puff energy consumption due to heating the total system decreased first and then increased,while the puff-by-puff energy consumption of the e-liquid vaporization showed an opposite trend.The puff-by-puff heat losses due to heat conduction,convection and radiation raised continuously,by 8.4%,6.8%and 11.6%respectively when compared with the previous puff.The puff-by-puff thermal efficiency reduced gradually,from 93.3%to 90.9%when the puffing number increased from 1 to 5.

关 键 词：电子烟 多孔雾化芯 数值模拟 传热传质 热效率 

分 类 号：TS452[农业科学—烟草工业]