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TDLAS火焰燃烧温度测量方法改进

Improvement of Combustion Flame Thermometry Based on TDLAS

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【Author】 YANG Bin;HUANG Bin;YANG Hui-nan;LIU Pei-jin;HE Guo-qiang;Institute of Particle and Two-phase Flow Measurement/Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,University of Shanghai for Science and Technology;Science and Technology on Combustion,Internal Flow and Thermal-Structure Laboratory,Northwestern Polytechnical University;Beijing System Design Institute of Electro-Mechanic Engineering;

【机构】上海理工大学颗粒与两相流测量研究所/上海市动力工程多相流动与传热重点实验室；西北工业大学燃烧热结构与内流场重点实验室；北京机电工程总体设计部；

【摘要】基于可调谐二极管激光吸收光谱技术（TDLAS）双线温度测量原理,设计了7153.748-7154.354 cm^-1谱线对单激光器TDLAS燃烧温度测量系统,对平面预混火焰燃烧温度进行测量,发现由于吸收较弱、信噪比较低等造成测量结果与热电偶测量结果相对偏差较大。针对这一问题,提出了采用（7185.597-（7444.352+7444.371））cm^-1双激光器TDLAS系统,并结合增加光程方法来改进原有的温度测量精度。结果表明:采用双激光器可放宽谱线对的选择范围,选择吸收更强的谱线对可以有效提高信噪比,并且结合增加光程,可实现TDLAS温度测量结果与热电偶测量偏差由10%降低到5%。更多还原

【Abstract】 The system with 7 153.748-7 154.354 cm^-1 line-pair based on tunable diode laser absorption spectroscopy（TDLAS） is designed for temperature measurement of premixed flat flame.Due to the weak absorptions,the signal-to-noise ratios（SNR） are low,and the relative deviation between TDLAS and thermocouple are larger.Therefore,the dual lasers TDLAS system with（7 185.597-（7444.352 +7 444.371）） cm^-1 line-pair,which is combined long path method,is developed for improvement of measurement accuracy.The result shows that the selected range will be broaden by using dual lasers,and the stronger line pair will be selected for improvement of SNR.Furthermore,combined the long path method,the relative deviation between TDLAS and thermocouple can be reduced from 10%to 5%.更多还原

【关键词】计量学；火焰温度；燃烧诊断； TDLAS；双激光器；
【Key words】 metrology； flame thermometry； combustion diagnostics； TDLAS； dual lasers；

【基金】国家自然科学基金(51306123);教育部博士点基金联合资助课题(20133120120008);上海市科委科研计划项目(13DZ2260900);上海高校青年教师培养资助计划项目(ZZslg15002)

【文献出处】计量学报 ,Acta Metrologica Sinica , 编辑部邮箱 ,2016年06期

【分类号】TB942
【下载频次】232

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