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利用铝原子的5kHz激光诱导荧光成像技术对固体推进剂火焰中的铝颗粒进行成像。

Imaging Aluminum Particles in Solid-Propellant Flames Using 5 kHz LIF of Al Atoms.

作者信息

Vilmart Gautier, Dorval Nelly, Devillers Robin, Fabignon Yves, Attal-Trétout Brigitte, Bresson Alexandre

机构信息

Département de Physique, Instrumentation, Environnement et Espace, ONERA, Université Paris-Saclay, F-91123 Palaiseau, France.

Département Multi-Physique pour l'Energétique, ONERA, Université Paris-Saclay, F-91123 Palaiseau, France.

出版信息

Materials (Basel). 2019 Jul 29;12(15):2421. doi: 10.3390/ma12152421.

DOI:10.3390/ma12152421
PMID:31362463
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6695702/
Abstract

Laser-induced fluorescence imaging of aluminum atoms (Al-PLIF) is used to analyze the spatio-temporal behavior of aluminized solid propellant combustion. Using alternating LIF and chemiluminescence emission images of the particles in the gaseous and liquid phase evolving close to and far above the dynamically varying propellant surface, sequences of images were recorded and analyzed. The good sensitivity achieved enabled us to track the dynamics of the flame in the vicinity of particles detected all along the flame extension and up to 1.5 MPa. Analysis of wide-field images enabled droplet velocity measurements due to the high LIF sampling rate (5 kHz). The observed typical plume structures were in good agreement with alumina-formation prediction and previous shadowgraphy visualization. High-resolution sequences of images showed gaseous distribution behavior around the molten particles. The Al vapor phase was thus found to extend between 3 and 6.5 radii around the particles. Particle detachment dynamics were captured just above the propellant surface.

摘要

铝原子激光诱导荧光成像（Al-PLIF）用于分析含铝固体推进剂燃烧的时空行为。利用靠近动态变化的推进剂表面及在其上方远处气相和液相中颗粒的交替LIF和化学发光发射图像，记录并分析了图像序列。所实现的良好灵敏度使我们能够追踪沿火焰延伸直至1.5 MPa压力下检测到的颗粒附近火焰的动态。由于高LIF采样率（5 kHz），对宽视野图像的分析实现了液滴速度测量。观察到的典型羽流结构与氧化铝形成预测及先前的阴影成像可视化结果吻合良好。高分辨率图像序列显示了熔融颗粒周围的气体分布行为。由此发现铝气相在颗粒周围3至6.5个半径之间延伸。在推进剂表面上方捕捉到了颗粒脱离动态。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/de44d28db6ff/materials-12-02421-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/cfe93264bc1d/materials-12-02421-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/614fcb881e02/materials-12-02421-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/98c3e9bece67/materials-12-02421-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/6cc39ccc0caf/materials-12-02421-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/7027f1748550/materials-12-02421-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/3dc6f2665199/materials-12-02421-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/e708f91806fb/materials-12-02421-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/c1e2616876f3/materials-12-02421-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/8f9fc3ef72cc/materials-12-02421-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/1d6922c606d9/materials-12-02421-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/e3197f88b5a3/materials-12-02421-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/de44d28db6ff/materials-12-02421-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/cfe93264bc1d/materials-12-02421-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/614fcb881e02/materials-12-02421-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/b9d54c628a1e/materials-12-02421-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/98c3e9bece67/materials-12-02421-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/6cc39ccc0caf/materials-12-02421-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/7027f1748550/materials-12-02421-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/3dc6f2665199/materials-12-02421-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/e708f91806fb/materials-12-02421-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/c1e2616876f3/materials-12-02421-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/8f9fc3ef72cc/materials-12-02421-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/1d6922c606d9/materials-12-02421-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/e3197f88b5a3/materials-12-02421-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c711/6695702/de44d28db6ff/materials-12-02421-g013.jpg

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本文引用的文献

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Ultrashort-pulse laser-induced breakdown spectroscopy for detecting airborne metals during energetic reactions.用于在高能反应期间检测空气中金属的超短脉冲激光诱导击穿光谱技术。
Appl Opt. 2019 Apr 1;58(10):C79-C83. doi: 10.1364/AO.58.000C79.
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Detection of iron atoms by emission spectroscopy and laser-induced fluorescence in solid propellant flames.通过发射光谱法和激光诱导荧光法检测固体推进剂火焰中的铁原子。
Appl Opt. 2018 May 10;57(14):3817-3828. doi: 10.1364/AO.57.003817.
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Laser-induced-breakdown-spectroscopy-based detection of metal particles released into the air during combustion of solid propellants.
基于激光诱导击穿光谱法检测固体推进剂燃烧过程中释放到空气中的金属颗粒。
Appl Opt. 2018 Mar 10;57(8):1910-1917. doi: 10.1364/AO.57.001910.
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