基于1397nm波长H_2O分子吸收光谱的温度测量研究  

Measurement of Gas Temperature Based on H_2O Absorption Spectroscopy in Wavelength Range of 1397 nm

作　　者：孙奇 王广宇 屈东胜 

机构地区：[1]装备学院激光推进及其应用国家重点实验室,北京101416

出　　处：《机电产品开发与创新》2017年第2期80-83,共4页Development & Innovation of Machinery & Electrical Products

摘　　要：为了准确获得燃烧场温度信息,利用可调谐半导体激光吸收光谱技术进行了气体温度测量实验。利用1397nm波长范围内的两条H_2O吸收谱线进行气体温度测量,简化了实验装置和数据处理的复杂程度。将两种测量方法得到的温度与管炉温度对比,可以看出直接吸收光谱的测量误差在3%以内,波长调制光谱误差在4%。结果表明,1397nm波长范围内的两条H_2O吸收谱线可以用于TDLAS气体温度的测量,并且测量的精度较高。In order to obtain the temperature information of the flow field accurately,the tunable diode laser absorption spectroscopy technology was using for the gas temperature measurement. The experiments were carried out using two absorption lines in the wavelength range of 1397 nm and this method simplifies the complexity of the experimental device and data processing. Comparing the temperature measuring by the two methods with the one of the tube furnace,the measurement error of direct absorption spectrum is within 3%,and the error of wavelength modulation spectrum is 4%.The results show that two absorption lines in the wavelength range of 1397 nm can be used to mea-sure the gas temperature by TDLAS and the measurement accuracy is good enough.

关 键 词：可调谐半导体激光吸收光谱 直接吸收光谱 波长调制光谱 温度测量 吸收谱线 

分 类 号：O433.1[机械工程—光学工程]