卷烟燃烧耦合匹配评价方法及应用

Cigarette paper/cut tobacco filler coupling compatibility during smoldering and puffing:evaluation method and its application

为揭示卷烟燃烧耦合匹配过程及燃烧耦合匹配对卷烟表观燃烧质量的影响,基于图像法和特征温度法建立了卷烟纸和烟丝瞬时燃烧速率的同步测试方法,提出了卷烟纸和烟丝燃烧耦合的量化评价指标,并结合燃烧锥温度变化分析了燃烧耦合匹配对不同圆周卷烟表观燃烧质量的影响机理。结果表明:①静燃阶段,3种不同圆周卷烟的卷烟纸和烟丝瞬时燃烧速率均无明显差异,吸燃阶段,卷烟纸和烟丝的瞬时燃烧速率差别较大。②静燃阶段,卷烟燃烧主要由烟丝燃烧带动,吸燃阶段,转变为主要由卷烟纸燃烧带动。圆周越小,吸燃耦合度峰值越大,吸燃匹配性越差,但由总耦合度均接近于1.0可知,抽吸导致的卷烟纸和烟丝燃烧的严重失衡在较长的静燃期间均逐渐得以恢复。③中、细支卷烟燃烧失衡更剧烈是造成其燃烧锥落头倾向较高的主要原因,卷烟燃烧传热加快缩短了炭线从生成到消失的循环周期,导致炭线更窄、更整齐,但卷烟燃烧时传热加快对烟丝燃烧灰化程度的影响较小,因而不同圆周卷烟烟灰色差的差异较小。

In order to investigate the coupling between cigarette paper and cut tobacco filler for a lit cigarette and its influences on the apparent combustion property of cigarette,a synchronous testing method for the instantaneous combustion rates of cigarette paper and cut filler was established based on thermal imaging method and the characteristic temperature method.The quantitative evaluation indexes of combustion coupling between cigarette paper and cut filler were proposed and measured,and the influencing mechanism of combustion coupling compatibility on the apparent combustion properties of cigarettes with different circumferences was analyzed according to the temperature variations of combustion cones.The results showed that:1)There was no significant difference in the instantaneous combustion rates of cigarette paper and cut filler of three different circumference cigarettes during smoldering,while there was a significant difference during puffing.2)The combustion of the cigarette was driven by the cut filler in the smoldering stage,while it was driven by the cigarette paper in the puffing stage.The smaller the circumference was,the higher the peak value of the puffing coupling degree and the worse the compatibility would be.However,since the total combustion coupling degree was close to 1.0,indicating that the serious imbalance of cigarette paper and cut filler combustion caused by puffing gradually recovered during a longer smoldering period.3)The greater imbalance in the combustion of demi-and super-slim cigarettes was one of the main reasons for their higher cone-falling propensities.The accelerated heat transfer during cigarette combustion shortened the burn line formation and disappearance cycle,which made the burn lines narrower and more uniform.However,the accelerated heat transfer during cigarette combustion had a smaller effect on the ashing completeness of the combustion cone,so the ash color difference between cigarettes with different circumferences was relatively small.