摘要
根据气体声波传输与测温原理,气体介质常数与气体介质浓度及成分有关,建立气体介质常数与气体介质浓度的相应关系对气体温度精确测量意义重大。利用自行研制的声波测温系统,测量在距离确定条件下一定空间里不同煤粉浓度下声波传输飞渡时间的相应数据。对数据进行拟合处理,得到了煤粉气体介质浓度和气体介质常数的数学模型。经验证,该模型可以将测量精度提高6.8℃左右,为进一步的煤粉燃烧情况下的高温气体测量提供了理论支持。
The gas dielectric constant is related to the gas dielectric concentration and content according to the principle of the gas acoustic transmission and temperature measurement,mapping between gas dielectric constant and gas dielectric concentration is very significant for precise measurement of gas temperature.Our independently developed acoustic temperature measurement system is used to measure acoustic travel time for different pulverized coal concentration in specified distance conditions inside a specific space.The obtained data are fitted to get the mathematical model between the dielectric concentration and dielectric constant of the pulverized coal gas.After validation,this model can reach about 6.8℃measurement precision,so it provides theoretical support for further high-temperature gas measurement in pulverized coal combustion.
作者
李鹏飞
吕玉祥
康爱国
LI Pengfei;L Yuxiang;KANG Aiguo(Physics and Optoelectronic Engineering College,Taiyuan University of Technology,Taiyuan Shanxi 030600,China)
出处
《电子器件》
CAS
北大核心
2019年第6期1440-1443,1491,共5页
Chinese Journal of Electron Devices
基金
山西省自然科学基金项目(201601D102005)
关键词
声波测温
模型构建
气体测温原理
气体介质浓度
气体介质常数
飞渡时间
acoustic temperature measurement
model construction
gas temperature measurement principle
gas dielectric concentration
gas dielectric constant
travel time
