烟油型电子烟雾化温度特性的相似扩尺实验研究

Similarity experiment on temperature characteristics of e-cigarette and establishment of scaledmodel experimental platform

【目的】提出一种采集烟油型电子烟实验参数的新方法。【方法】基于相似原理设计搭建电子烟扩尺实验台,采用由丙二醇(PG)和丙三醇(VG)组成的不同配比的烟油进行相似实验研究。根据各物理量间的相似准则关系,模型实验数据可换算得到原型电子烟的数据。【结果】(1)在相同加热功率及抽吸模式条件下,纯VG的电加热丝温升速率高于纯PG,加热丝温升速率随VG含量增大而增大。(2)雾化芯中加热丝的温升速率最高,加热丝与导油棉交界处的温升速率次之,棉中心位置最慢。(3)在三口连续抽吸实验中,每口抽吸过程中各温度测点的初始及最高温度会随抽吸口数呈整体抬升趋势。

[Objective]A novel method for collecting the experimental parameters of electronic cigarette was proposed.[Method]Based on the similarity principle,a scaled-model experimental platform was designed.The similarity experiments were carried out with various e-liquids composed of propylene glycol(PG)and vegetable glycerol(VG)in different ratios.According to the similarity criteria of physical parameters,the scaled-model simulation results can be converted into the experimental results of prototype electronic cigarettes.[Results](1)Under the same heating power and suction mode,the temperature rise rate of coil for VG was faster than that for PG.The temperature rise rate of coil would increase with the VG content in e-liquid.(2)The temperature rise rate of coil in atomizing core was the fastest among all measuring points,and follow by that at the interface position between coil and cotton,and that at the center of wick was the slowest.(3)During the consecutive puffing process,the initial temperature and maximum temperature of each puffing would increase with puff number.