用红外热成像方法测量火焰温度的实验研究

摘要

Thermograph can be used to measure the temperature distribution of solid surfaces accurately, but to flames, many factors, especial ly the emissivity determination, can introduce gross measurement errors. Therefo re, the effects of emissivity determination on flame temperature field measureme nt by a Thermography, were evaluated theoretically and experimentally in this pa per, and the experimental results of flame temperature distribution after emissi vity correction based on measurements of flame radiant spectra were given either . The results show that Thermography can be used to qualitatively visualize the flame thermal structure in real time and with many merits, such as intuit and mo re information, etc. But to quantitative measurement of flame temperature, the e missivity must be corrected by proper methods.%在理论分析的基础上,主要通过实验测量和数据分析讨论了将红外热像仪直接用于火焰温度场测量时火焰发射率的设定对其测量结果的影响问题,并给出了通过基于火焰辐射光谱测量对其发射率进行修正后的温度场实验结果.研究结果表明,将红外热像仪应用于火焰温度及辐射特性的测量,可以对火焰热结构的时空分布和变化进行实时观测和记录,因而具有直观、信息量大等优点.但当要获取比较准确的定量结果时,则必须对其发射率进行合理修正.