高温高压吸收光谱测量实验装置

doi:10.3964/j.issn.1000-0593(2025)03-0645-05

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摘要：高温高压气体分子特征吸收光谱测量对于研究谱线参数、开展基于激光吸收光谱的燃烧诊断具有重要意义。针对缺乏高温、高压光谱测量条件问题，该研究首次建立了能够在常温到1 000 ℃和0～100 atm温压范围内工作的高温高压吸收光谱测量研究实验装置，装置恒温区吸收光程为20 cm，在此区间温度均匀性优于5%。采用扫频激光光源对H₂O分子在7 370～7 450 cm^-1波段的高温高压吸收光谱进行了实验测量和分析研究。首次在高达1 000 ℃和75 atm的稳态条件下，获得了H₂O的宽波段高温高压吸收光谱数据，与采用HITRAN数据库的模拟光谱具有良好的一致性，验证了装置的可用性。此装置的建立将有利于开展H₂O、CO₂等高温高压光谱测量分析，丰富高温高压光谱参数，对推动吸收光谱燃烧诊断技术向高温高压方向发展具有重要的参考和应用价值。

关键词：吸收光谱；高压光谱；高温光谱；燃烧诊断

Abstract：Absorption spectroscopy measurements of gas molecules in high-temperature and high-pressure environments are crucial for studying absorption line parameters and laser absorption spectroscopy-based combustion diagnostics. Because of the lack of high-temperature and high-pressure measurement environments, this work established an experimental setup for spectroscopy measurements in the temperature range of 25~1 000 ℃ and pressure range of 0~100 atm for the first time. The absorption path length was 20 cm, and the temperature uniformity within the path length was better than 5%. The feasibility of the experimental setup was demonstrated by measuring H₂O absorption spectroscopy under conditions of 1 000 ℃ and 75 atm using a swept laser whose wavelength can cover 7 370~7 450 cm^-1. The measured broadband spectra were by the simulated spectra based on the HITRAN database. This experimental setup can provide stable environments for the research of spectroscopic parameters of different molecules (H₂O, CO₂, etc.) at elevated pressures and temperatures and has high potential to promote the development of absorption spectroscopy-based combustion diagnostics.

Key words：Absorption spectroscopy; High pressure spectroscopy; High temperature spectroscopy; Combustion diagnostics

收稿日期: 2024-02-29 修订日期: 2024-06-18

中图分类号:

O433.5

基金资助: 国家自然科学基金项目(61775221)资助

通讯作者: 王瑞峰 E-mail: rfwang@aiofm.ac.cn

作者简介: 黄天旭，1997年生，中国科学院合肥物质科学研究院安徽光学精密机械研究所大气物理化学研究室及中国科学技术大学研究生院科学岛分院博士研究生 e-mail: zgwbqda@mail.ustc.edu.cn

引用本文:

黄天旭，王瑞峰，梅教旭，王贵师，高晓明，刘锟. 高温高压吸收光谱测量实验装置[J]. 光谱学与光谱分析, 2025, 45(03): 645-649.
HUANG Tian-xu, WANG Rui-feng, MEI Jiao-xu, WANG Gui-shi, GAO Xiao-ming, LIU Kun. Experimental Setup for High Temperature and High Pressure Absorption Spectroscopy Measurements. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2025, 45(03): 645-649.

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