Laser induced breakdown spectroscopy for local equivalence ratio measurement of kerosene/air mixture at elevated pressure

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• 作者：Shaohua Zhang^a ; Xilong Yu^a ; ^{xlyu@imech.ac.cn} ; Fei Li^a ; Guojian Kang^b ; Lihong Chen^a ; Xinyu Zhang^a
• 关键词：Laser induced breakdown spectroscopy (LIBS) ; Equivalence ratio ; Kerosene/air mixture ; Elevated pressure
• 刊名：Optics and Lasers in Engineering
• 出版年：2012
• 期刊代码：98_01438166
• 类别：cp
• 出版时间：June, 2012
• 卷：50
• 期：6
• 页码：877-882
• 文件大小：451 K

摘要

The quantitative local equivalence ratio measurements of premixed kerosene/air gas at elevated pressure by the laser induced breakdown spectroscopy (LIBS) technique were preformed in a high temperature test cell, which was designed and manufactured for simulated supersonic combustion state. According to in-situ experimental conditions in supersonic combustion, the correlations between the values of emission intensity ratio of H/O, H/N and the equivalence ratio of premixed kerosene/air mixture in different gas pressures was established. The dependence of the FWHM of H_伪 on pressure of the mixture was also measured. Therefore, the laser diagnostic method for quantitative local equivalence ratio measurements of kerosene/air mixture by the LIBS technique in supersonic combustion was developed in laboratory. The fundamental data was prepared for on-line quantitative local equivalence ratio measurements of kerosene/air mixture in supersonic combustion experiments.