Abstract：The measurement of nonuniform temperature and concentration distributions was investigated based on tunable diode laser absorption spectroscopy technology. Through direct scanning multiple absorption lines of H2O, two zones for temperature and concentration distribution were achieved by solving nonlinear equations by least-square fitting from numerical and experimental studies. The numerical results show that the calculated temperature and concentration have relative errors of 8.3% and 7.6% compared to the model, respectively. The calculating accuracy can be improved by increasing the number of absorption lines and reduction in unknown numbers. Compared with the thermocouple readings, the high and low temperatures have relative errors of 13.8% and 3.5% respectively. The numerical results are in agreement with the experimental results.
宋俊玲，洪延姬，王广宇，潘 虎 . 基于最小二乘法的激光吸收光谱非均匀温度/浓度分布研究 [J]. 光谱学与光谱分析, 2013, 33(08): 2047-2050.
SONG Jun-ling, HONG Yan-ji, WANG Guang-yu, PAN Hu . Measurement of Nonuniform Temperature and Concentration Distribution by Absorption Spectroscopy Based on Least-Square Fitting . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(08): 2047-2050.
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