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《Optics & Optoelectronic Technology》 2008-05
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Measuring Accuracy of the Flame Temperature Based on Combustion Emissivity

XIA Shou-zhi ZHU Xin-wang YAO Qi-qi(School of Science,Wuhan University of Engineering,Wuhan 430074,China)  
The important factors that influence the measuring accuracy of frame temperature via radiation method are analyzed in this paper.Based on the thermo-radiation theory of gray-body,the correlative parameters describing the characters of the emissivity variable are investigated.The emissivity function theoretic model of the burning medium is established.Different approximate schemes are adopted according to the property of combustion production.The effect of emissivity precision on the measuring accuracy of the flame temperature is discussed.The results indicate that the medium in flame can be divided into ideal gray body,linear gray body and generic gray body.The correlative emissivity functions are different,and the measuring precision is better by multi-wavelengths than by single wavelength.
【Fund】: 国家自然科学基金(50636010);; 湖北教育厅科研(D200615003)资助项目
【CateGory Index】: TK123
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