摘要
多孔介质表面燃烧器的辐射效率是其最重要的热性能参数之一。总结了多孔介质表面燃烧器的3种辐射效率测量方法(单点测量法、多点测量法和基于斯忒藩-玻耳兹曼定律的计算法)的测量原理、特点以及适用范围。燃烧器的辐射效率测量应综合考虑燃烧器的表面材料特性以及实验条件等因素,合理选择测量方法。单点测量法和多点测量法(包括半球表面测量法、圆柱表面测量法、平行平面测量法)属于直接测量。前者是基于燃烧器表面为漫辐射表面的假设条件提出的,其测量结果受燃烧器表面特性影响较大;后者的测量结果不受燃烧器表面特性影响,测量准确度高。当使用直接测量法时,推荐采用多点测量法。基于斯忒藩-玻耳兹曼定律的计算法属于间接测量,当已知燃烧器表面发射率和表面温度时,操作简单,结果准确度高。
The radiation efficiency of porous media surface burner is one of the most important thermal performance parameters. The measurement principle, characteristics and application range of three methods for measuring the radiation efficiency of porous media surface burner( single-point measurement method,multi-point measurement method and calculation method based on Stefan-Boltzmann law) are summarized. The radiation efficiency measurement of the burner should take into account the surface material characteristics and experimental conditions of the burner and select the measurement method reasonably. Single-point measurement method and multi-point measurement method( including hemispherical surface measurement method,cylindrical surface measurement method,and parallel plane measurement method) belong to direct measurement. The former is based on the assumption that the burner surface is a diffuse radiation surface,and its measurement results are greatly affected by the characteristics of the burner surface. The measurement result of the latter is unaffected by the surface characteristics of the burner,and the measurement accuracy is high. When using direct measurement methods,it is recommended to use a multi-point measurement method. The calculation method based on Stefan-Boltzmann law belongs to indirect measurement.When the surface emissivity and surface temperature of the burner are known,the operation is simple and the accuracy of the results is high.
作者
许倩
彭世尼
吕山
XU Qian;PENG Shini;LYU Shan
出处
《煤气与热力》
2021年第2期26-31,41,10043,共8页
Gas & Heat
关键词
多孔介质表面燃烧器
辐射效率
多点测量法
单点测量法
计算法
porous media surface burner
radiation efficiency
multi-point measurement method
single-point measurement method
calculation method
