Study of High Temperature Water Vapor Concentration Measurement Method Based on Absorption Spectroscopy
CHEN Jiu-ying1, LIU Jian-guo1*, HE Jun-feng2, HE Ya-bai1, ZHANG Guang-le1, XU Zhen-yu1, GANG Qiang3, WANG Liao3, YAO Lu1, YUAN Song1, RUAN Jun1, DAI Yun-hai1, KAN Rui-feng1
1. Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China 2. Army Officer Academy of PLA, Hefei 230031, China 3. Key Laboratory of Hypersonic Ramjet Technology, 31st Research Institute, China Aerospace Science and Industry Corporation, Beijing 100074, China
Abstract：Tunable diode laser absorption spectroscopy (TDLAS) has been developed to realize the real-time and dynamic measurement of the combustion temperature, gas component concentration, velocity and other flow parameters, owing to its high sensitivity, fast time response, non-invasive character and robust nature. In order to obtain accurate water vapor concentration at high temperature, several absorption spectra of water vapor near 1.39 μm from 773 to 1 273 K under ordinary pressure were recorded in a high temperature experiment setup using a narrow band diode laser. The absorbance of high temperature absorption spectra was calculated by combined multi-line nonlinear least squares fitting method. Two water vapor absorption lines near 7 154.35 and 7 157.73 cm-1 were selected for measurement of water vapor at high temperature. A model method for high temperature water vapor concentration was first proposed. Water vapor concentration from the model method at high temperature is in accordance with theoretical reasoning, concentration measurement standard error is less than 0.2%, and the relative error is less than 6%. The feasibility of this measuring method is verified by experiment.
陈玖英1，刘建国1*，何俊峰2，何亚柏1，张光乐1，许振宇1，冮 强3，王 辽3，姚 路1，袁 松1，阮 俊1，戴云海1，阚瑞峰1 . 基于吸收光谱原理的高温水汽浓度测量方法研究 [J]. 光谱学与光谱分析, 2014, 34(12): 3174-3177.
CHEN Jiu-ying1, LIU Jian-guo1*, HE Jun-feng2, HE Ya-bai1, ZHANG Guang-le1, XU Zhen-yu1, GANG Qiang3, WANG Liao3, YAO Lu1, YUAN Song1, RUAN Jun1, DAI Yun-hai1, KAN Rui-feng1 . Study of High Temperature Water Vapor Concentration Measurement Method Based on Absorption Spectroscopy . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(12): 3174-3177.
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