气流通道设计参数对自然烟气卷烟逐口烟气组分的影响

Influences of airflow pathway design parameters on puff-by-puff releases of aerosol components from a heated tobacco product called natural smoke cigarette

为探究气流通道设计对自然烟气卷烟(NSC)逐口烟气组分的影响,考察了不同打孔参数对NSC主流烟气中关键组分逐口释放量、抽吸后烟支各段组分截留率、烟气出口平均温度及平均吸阻的影响。结果表明:①各打孔条件下,随抽吸口数的增加,TPM和水分的释放量表现为先上升后下降,烟碱的释放量呈上升趋势,甘油的释放量表现为先上升后趋于平缓,丙二醇的释放量呈先上升直至最后一口略微下降的趋势。②在相同打孔位置下,随打孔数量的增加,关键组分的释放量降低,且其在烟丝段残留率和滤棒段截留率均有所升高,气溶胶中关键组分的转移率呈降低趋势,烟气出口平均温度和平均吸阻逐渐降低。③在相同打孔数量下,打孔位置越靠近烟丝段,关键组分的释放量越高,气溶胶中关键组分的转移率升高,烟丝段和滤嘴段关键组分截留率降低;但是打孔位置对于烟气出口平均温度和平均吸阻的影响并不明显。④单孔面积相同时,打孔数量越少,打孔位置越靠近烟丝段,侧壁通孔形成的压差越大,组分有效迁移路径越短,越利于烟气组分的迁移。

To study the effects of airflow pathway design parameters on puff-by-puff smoke components of a heated tobacco product(called natural smokes cigarette,or NSC),the effects of different perforation parameters on the puff-by-puff releases of key components in the aerosol of NSC,the retention rate of the components in each section of the cigarette after smoking,and the average temperature and draw resistance at the aerosol outlet were investigated.The results showed that:(1)With the proceeding puffs,the releases of total particulate matters(TPMs)and moisture in the aerosol of NSC initially increased and then decreased,the release of nicotine increased,the release of glycerol initially increased and then remained stable,and the release of propylene glycol showed an increasing trend until it slightly decreased in the last puff under different perforation conditions.(2)With the same perforation location,the releases of key components decreased and their retention rates in the tobacco and filter sections increased,the transfer rates of key components to the aerosol decreased,and the average aerosol temperature and draw resistance at the outlet gradually decreased as the number of perforations increased.(3)For the same number of perforations,the releases of key components and their transfer rates to the aerosol increased,while their retention rates in the tobacco and filter sections decreased as the distance between the perforation location and the tobacco section decreased.However,the effects of the perforation location on the average aerosol temperature and draw resistance at the outlet were not apparent.(4)When the area of each hole was the same,the lower the number of perforations and the shorter the distance between the perforation and the tobacco section,the shorter the effective migration pathway of components,which was conducive to the migration of aerosol components.