基于卷烟温度检测技术的瞬时燃烧速率表征及燃烧锥区域特征分析

摘要

为了深入研究卷烟燃吸过程中的燃烧状态特征,提出了基于卷烟温度检测技术的瞬时燃烧速率表征方法,即以燃烧锥特征温度T0.5的移动表征卷烟瞬时燃烧速率;同时根据卷烟燃烧锥气相温度分布特征、传热特点,将燃烧锥划分为烟灰区、烟灰与燃烧过渡区、燃烧区和热解区.结果表明:①以燃烧锥特征温度T0.5的移动情况来表征卷烟瞬时燃烧速率,同时将燃烧温度和燃烧速率关联起来,能够准确地获得卷烟在燃吸过程中烟丝实时参与燃烧反应的量.②构建了卷烟燃烧锥区域划分的约束条件.在约束条件的限定下,获得卷烟燃烧锥各区域在燃吸过程中体积的变化情况,发现随着抽吸的进行,参比卷烟3R4F燃烧锥燃烧区体积呈增大的趋势,而热解区体积则呈减小的趋势.%In order to research the combustion characteristics of cigarette during smoking intensively, a method for characterizing the instantaneous burning rate of cigarette was proposed based on cigarette temperature measurement technology, wherein the instantaneous burning rate was characterized by the displacement of characteristic temperature T0.5 of burning cone. According to the characteristics of gas temperature distribution and feature of heat transfer in burning cone, the burning cone was divided into four regions, ash region, transition from ash to combustion regions, combustion region, pyrolysis region. The results showed that: 1) By characterizing the instantaneous burning rate of cigarette by the displacement of characteristic temperature T0.5 of burning cone and relating burning temperature to burning rate, it became possible to obtain the amount of tobacco involved in combustion during smoking realtimely and accurately. 2) The temperature range of each region in burning cone were constructed. The variation of volume of each region in burning cone was obtained during smoking, it was found that the volume of combustion region in 3R4F cigarette increased and that of pyrolysis region decreased with the proceeding of smoking.