光学精密工程2025，Vol.33Issue(18)：2833-2843,11.DOI:10.37188/OPE.20253318.2833
基于视线效应修正的中红外激光吸收光谱对冲扩散火焰温度测量方法
Line-of-sight effect-corrected mid-infrared laser absorption spectroscopy for temperature measurement in counterflow diffusion flames
摘要
Abstract
Accurate measurement of the temperature in counterflow diffusion flame is crucial for construct-ing high-fidelity combustion chemical reaction mechanisms,revealing pollutant formation processes,and developing efficient and clean combustion technologies.This holds significant theoretical and engineering application value.Laser Absorption Spectroscopy(LAS),a widely used non-contact temperature mea-surement technique,has garnered considerable attention in recent years.However,due to the non-uni-form distribution of thermodynamic and chemical parameters along the absorption path,traditional Line-of-Sight(LOS)integration-based measurement methods exhibit significant uncertainties when acquiring flame temperature information,affecting their accuracy and reliability.While traditional tomography recon-struction methods and multi-line profile fitting techniques can,to some extent,recover the temperature in-formation of the flame center,these approaches are often complex and computationally intensive,making them difficult to meet the demands of high-fidelity diagnostic testing.This paper proposed a line-of-sight(LOS)temperature measurement method using mid-infrared laser absorption spectroscopy,incorporating a correction strategy for LOS effects.The strategy quantified the deviation in the LOS temperature mea-surements caused by the non-uniformities at different flame positions,based on computational fluid dynam-ics(CFD)and spectral numerical simulations.The correction was applied to the LOS temperature mea-surements.To validate this strategy,systematic LOS temperature measurements were conducted using the strong absorption band of H2O molecules around 2.5 μm,with comparisons made against tomography reconstruction measurements and CFD simulation results,which incorporate detailed chemical reaction mechanisms.Experimental results indicate that the proposed temperature correction strategy significantly enhances the reliability of LOS temperature measurements for counterflow diffusion flames with various fu-els.Compared to tomography reconstruction experiments and CFD results,the relative differences in the measurements were reduced from 10%～20%before correction to within 5%,with most measurement lo-cations showing discrepancies of less than 2%.The temperature correction strategy presented in this study substantially improves the reliability of the LOS measurement method,while eliminating the time-consum-ing mechanical tomography scanning steps.This provides an effective solution for the rapid and accurate measurement of counterflow diffusion flames temperatures.关键词
视线效应/中红外激光吸收光谱技术/温度分布/温度修正Key words
line of sight/mid-infrared tomographic absorption spectroscopy/temperature distributions/temperature correction分类
物理学引用本文复制引用
万涛,陆盛曜,马柳昊,孙博闻,黄弈涛,王宇..基于视线效应修正的中红外激光吸收光谱对冲扩散火焰温度测量方法[J].光学精密工程,2025,33(18):2833-2843,11.基金项目
国家自然科学基金项目(No.52476168) （No.52476168）
佛山仙湖实验室重大项目(No.XHD2024-21000000-03) （No.XHD2024-21000000-03）
中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室开放基金项目(No.SKLA02022001A05) （No.SKLA02022001A05）
