Gas-phase pressure and flow velocity fields inside a burning cigarette during a puff
作者单位：Zhengzhou Tobacco Research Institute of CNTC
会议名称：《中国烟草学会2017年学术年会》
会议日期：2017年
学科分类：08[工学] 0822[工学-轻工技术与工程]
关 键 词：Cigarette Gas-phase Temperature Pressure Velocity Distribution
摘 要：Heat and mass transfer inside a burning cigarette directly influence the level and chemical composition of its mainstream and sidestream emissions. During a 2-s 35 m L model puffing regime, different thermophysical processes occur inside the burning coal as a result of forced air flow, including rapid temperature rise up to 900?C and a series of pyrolytic or oxidative reactions leading to the formation of smoke aerosol. Accurate measurements of transient thermophysical parameters such as temperature,pressure and gas velocity are thus an essential step towards understanding the smoke formation. In this study, we have developed micro-sensors that can be accurately inserted at specific locations into a 3 R4 F research reference cigarette, and used to follow these sensitive and highly dynamic responses as a result of the puffing burn. Both temperature and pressure responses were systematically measured, and in combination with a computational method based on Darcy’s Law, we obtained the gas flow velocity of the burning cigarette puffed under a standard machine-smoking protocol. These quantitative data provide unparalleled insights into the complex thermochemical processes responsible for smoke formation inside a burning cigarette.