摘要
基于近红外H2O的吸收光谱,开发了一种同时测量高速气流温度、速度及H2O摩尔分数等参数的方法并在超声速燃烧场中开展了应用研究,分析了超声速燃烧场中存在的现象及规律。基于扫描波长调制光谱技术,利用两条H2O吸收谱线在超燃直连台隔离段和扩张段中开展了实验研究,实现了多参数的同时测量。燃烧室点火后:隔离段内无激波时,气流速度、温度、压强和H2O摩尔分数测量值与预测值基本吻合,相对偏差分别小于3.0%、7.2%、8.2%和3.9%;有激波时,气体速度、温度、H2O摩尔分数和压力都发生了明显变化,空气质量流量均值变化不明显,但波动明显增大。实验结果表明,基于波长调制光谱的传感器具有重要的工程应用价值。
In this paper, a method of measuring gas temperature, velocity, and mole fraction of H2O in a high-speed field based on near-infrared absorption spectra of H2O is proposed. The method is applied to a supersonic combustion field and some phenomena and laws in the combustion field are analyzed. The experiment is performed in a scramjet isolation section and extended section based on wavelength modulation spectroscopy using two H2O absorption spectral lines, and synchronous measurements of multiple parameters are realized. After performing the ignition test under combustion, the measured velocity, temperature, pressure, and mole fraction of H2O are consistent with the predicted values when there is no shock wave in the isolation section, and the relative errors are less than 3.0%, 7.2%, 8.2%, and 3.9%, respectively. If the isolation section has a shock wave, the gas velocity, temperature, pressure, and mole fraction of H2O have considerable differences. Additionally, information about the air mass flux has a small difference, but the fluctuation considerably increases. The experimental results show that the sensor based on wavelength modulation spectroscopy has great engineering value.
作者
屈东胜
樊宏杰
刘连伟
陈洁
邹前进
Qu Dongsheng;Fan Hongjie;Liu Lianwei;Chen Jie;Zou Qianjin(Luoyang Electronic Equipment Test Center of China,Luoyang,Henan471003,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2020年第3期192-199,共8页
Acta Optica Sinica
关键词
光谱学
高速气流
超声速燃烧场
波长调制光谱
气体参数
spectroscopy
high-speed gas flow
supersonic combustion field
wavelength modulation spectroscopy
gas parameters
