降温段通风孔对加热卷烟降温效果影响的模拟研究

Simulation of the Influence of Vents Design in the Cooling Section on the Cooling Effect of Heated Tobacco Product

摘要: 为探究固定通风面积下降温段通风孔设计对加热卷烟烟气流动特性和降温效果的影响，基于FLUENT建立加热卷烟多孔介质非平衡传热模型，对烟气流动换热特性展开了数值模拟，并通过实验测定关键部位温度进行了验证。结果表明：(1) 孔分布对静态加热温度场无明显影响，降温效果主要由下游端滤棒主导；(2) 通风面积一定时，加热卷烟出口烟气温度随着孔径增加而降低，随着通风孔与滤嘴段距离的增加而降低。(3) D分布下卷烟出口温度最低，中空段湍流强度、换热系数最大，分别为23.03%、63.14 (W/m²∙K)。数值模拟能较好地反馈烟支温度场和流场，或可为烟支辅助设计提供一定参考。

Abstract: To investigate the effects of ventilation hole design in the cooling segment on the aerosol flow characteristics and cooling performance of heated tobacco products under a fixed total ventilation area, a numerical model based on FLUENT was developed to simulate non-equilibrium heat transfer in the porous media of the product. Numerical simulations were performed to analyze the flow and heat transfer properties of the aerosol, and the results were validated through experimental measurements of temperatures at key locations. The findings revealed that: (1) The distribution pattern of ventilation holes had no significant influence on the static heating temperature field, with the cooling effect primarily dominated by the downstream filter section; (2) Under a constant ventilation area, the outlet aerosol temperature of the heated tobacco product decreased with increasing ventilation hole diameter and with greater distance between the ventilation holes and the filter segment; (3) The “Distribution D” configuration resulted in the lowest outlet temperature, while exhibiting the highest turbulence intensity and heat transfer coefficient in the hollow segment, reaching 23.03% and 63.14 W/m²∙K, respectively. The numerical simulations accurately captured the temperature and flow fields within the cigarette, providing valuable references for auxiliary design of tobacco products.