Ningbo LIU, Yijia ZHAO, Shengyao LU, Liuhao MA. Influence of non-uniform distributions of thermochemical parameters on measurement of sooting flame temperature by two-color laser absorption spectroscopy[J]. Optics and Precision Engineering, 2023, 31(19): 2799
- Optics and Precision Engineering
- Vol. 31, Issue 19, 2799 (2023)
Fig. 1. Images of two typical sooting flame
Fig. 2. Radial distribution of temperature and H2O concentration of sooting flame with different gas co-flow
Fig. 3. Flow chart to study influence of non-uniform thermochemical distributions on temperature measurement results of two-color laser absorption spectrum
Fig. 4. Simulated temperature deviation contour of six line pair at different temperatures and non-uniformity level for sooting flame with nitrogen co-flow
Fig. 5. Simulated temperature deviation contour of six line pair at different temperatures and non-uniformity level for sooting flame with air co-flow
Fig. 6. Schematic of laser absorption measurement setup for laminar premixed sooting flames
Fig. 7. Representative measurement of raw absorption signals， absorbance and residual with Voigt-fitting profiles
Fig. 8. Comparison of flame center temperature at different Ф using LOS-LAS and thermocouple measurement
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Table 1. Spectroscopic parameters of target line pairs
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