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Optical Diagnostics of Hydrogen-Air Diffusion Jet Flame
Journal of Engineering Thermophysics ( IF 2.4 ) Pub Date : 2022-07-27 , DOI: 10.1134/s1810232822030031
V. A. Arbuzov, E. V. Arbuzov, Yu. N. Dubnishchev, V. V. Lukashov, O. S. Zolotukhina

Abstract

The aim of this work is to adapt the methods of optical Hilbert diagnostics for visualization and study of phase optical density fields and flame temperature fields during combustion of H2/N2 in the air. The diagnostic complex is implemented on the basis of the IAB-451 Toepler shadow device with modified optical filtering, information source, and processing units. Visualization of phase perturbations induced by the studied medium in a probing multiwave light field is performed via polychromatic Hilbert and Foucault–Hilbert transformations in combination with registration and RGB-per-pixel processing of the dynamic structure of the images. The dynamic phase structure of the diffusion flame is visualized. From solution to the inverse problem of Hilbert optics, the temperature field of the flame is reconstructed and the value of the relative molar concentrations of the components of the fuel combustion products is restored. The reliability of the results is confirmed via comparison of hilbertograms obtained in the experiment and those reconstructed from the phase structures via the Abel transform.



中文翻译:

氢-空气扩散射流火焰的光学诊断

摘要

这项工作的目的是调整光学希尔伯特诊断方法,用于可视化和研究 H 2 /N 2燃烧过程中的相光密度场和火焰温度场 在空中。诊断综合体是在 IAB-451 Toepler 阴影设备的基础上实现的,该设备具有改进的光学过滤、信息源和处理单元。通过多色 Hilbert 和 Foucault-Hilbert 变换结合图像动态结构的配准和每像素 RGB 处理来实现在探测多波光场中由所研究介质引起的相位扰动的可视化。扩散火焰的动态相结构被可视化。通过求解希尔伯特光学反问题,重构了火焰的温度场,恢复了燃料燃烧产物组分的相对摩尔浓度值。

更新日期:2022-07-28
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