基于激光吸收光谱技术的非均匀流场气体参数测量研究

发布时间：2018-01-16 20:41

本文关键词：基于激光吸收光谱技术的非均匀流场气体参数测量研究　出处：《光谱学与光谱分析》2017年07期 　论文类型：期刊论文

【摘要】：为了探索激光吸收光谱技术在非均匀流场中的应用,提出了一种新的实现非均匀流场中气体参数定量测量的方法。预知被测流场中的温度变化范围后,选择在该温度范围内具有近似线性变化特性的谱线,线性拟合该温度范围内的谱线强度,结合实验测量的吸收光谱便可以实现非均匀流场中H_2O组分权重的温度积分平均值和H_2O组分积分平均值的定量测量。两温度分布和高斯温度分布模型的仿真研究证明了该方法的有效性和可靠性。两温度分布模型中的测量结果与理论值的偏差分别小于0.82%和1.10%,而高斯温度分布模型中不同光线中的测量值与理论值的最大偏差分别小于0.9%和3.6%。
[Abstract]:In order to explore the application of laser absorption spectroscopy in non-uniform flow field, a new method for quantitative measurement of gas parameters in non-uniform flow field is proposed. The spectral lines with approximately linear variation in the temperature range are selected, and the intensity of the lines in the temperature range is fitted linearly. The temperature integral mean value of the weight of H _ 2O component in non-uniform flow field and the average value of H _ 2O component integral value of H _ 2O component can be measured quantitatively by combining the absorption spectra measured by experiment. Two temperature distribution and Gao Si temperature distribution model can be realized. The simulation results show that the method is effective and reliable. The deviation between the measured results and the theoretical values in the two temperature distribution models is less than 0.82% and 1.10%, respectively. The maximum deviation between the measured values and theoretical values in Gao Si's temperature distribution model is less than 0.9% and 3.6, respectively.
【作者单位】：装备学院激光推进及其应用国家重点实验室;
【基金】：国家自然科学基金青年基金项目(21403299)资助
【分类号】：TN249
【正文快照】： 引言可调谐半导体激光吸收光谱(TDLAS)技术具有非接触、响应快、受气体环境影响小等优点,在流场诊断等领域具有广阔的应用前景[1]。近年来TDLAS技术获得了广泛的研究和大量的应用,先后在激波管[2]、发动机地面试验台[3-4]及气化炉[5]等设备中进行了应用研究。TDLAS是一种基于

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