Quantitative 1-D LIBS measurements of fuel concentration in natural gas jets at high ambient pressure

Zhang, Zhifei; Li, Tie; Wang, Ning; Huang, Shuai

doi:10.1016/j.expthermflusci.2021.110401

Cited by 8 publications

(2 citation statements)

References 55 publications

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“…They tried to use shorter delay times and narrower measurement gate widths to reduce the effect of composition transport inside the plasma. Zhang et al [23] performed the first quantitative 1D LIBS concentration measurements in a high-pressure environment in a direct-injection natural gas jet. They observed that the plasma volume increases significantly in the high-pressure environment, which can be used to achieve 1D measurements.…”

Section: Introductionmentioning

confidence: 99%

Direct comparison of ns LIBS and fs LIBS with high spatial and temporal resolution in gases

Feng¹,

Zhang²,

Li³

et al. 2022

J. Phys. D: Appl. Phys.

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Spatial resolution is one of the most critical parameters for spectroscopic measurements especially when used in gases. However, the spatial resolution of femtosecond (fs) laser-induced breakdown spectroscopy (LIBS) in gases has not been thoroughly investigated. Here, we directly compare the differences and connections between ns LIBS and fs LIBS through spatio-temporally resolved spectroscopy. At the time period we measured, unlike the ns LIBS plasma, the fs LIBS plasma does not show detectable expansion, and we do not find composition transport due to turbulence inside the fs LIBS. In other words, the local spectral emission in the fs LIBS can correlate precisely to the composition at that location before the arrival of the laser, while ns LIBS cannot. This feature allows fs LIBS has much higher spatial resolution than ns LIBS. Finally, this paper verified that fs LIBS can be used for one-dimensional measurements capability with its spatial resolution of 50 μm.

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Section: Introductionmentioning

confidence: 99%

Direct comparison of ns LIBS and fs LIBS with high spatial and temporal resolution in gases

Feng¹,

Zhang²,

Li³

et al. 2022

J. Phys. D: Appl. Phys.

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“…In recent years, laser induced breakdown spectroscopy (LIBS) technology has been increasingly used to rapidly detect the elemental composition of various materials in different media (i.e. solid, liquid and gas) [5][6][7][8][9][10][11] . As a multi-element real-time detection technology, it has great application potential in direct online monitoring of chemical elements in environmental media.…”

Section: Introductionmentioning

confidence: 99%

Improvement on the plasma excitation probability of aerosol particles based on aerodynamic lens

Gao

2023

Advanced Fiber Laser Conference (AFL2022)

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Aerodynamic lenses can increase the local particle number density of the aerosol beam. The particle number density of aerosol has an important effect on the excitation probability and spectral intensity of laser-induced plasma. Therefore, aerodynamic lenses have the potential to improve the identification efficiency of Laser Induced Breakdown Spectroscopy (LIBS) in aerosol real-time monitoring. In this study, the effects of an aerodynamic lens on laser excited aerosol particles were developed by experiments and simulations. The process of aerosol beam passing through an aerodynamic lens was simulated by using the CFD software FLUENT. The simulation results show that the setup can increase the aerosol concentration by three orders of magnitude. The Aerosol Focusing-Laser Induced Breakdown Spectroscopy (Aerosol Focusing-LIBS) experimental setup is established. The experimental and simulation results are in good agreement. And the experimental results show that the laser excitation probability has increased by about 5 times, the average intensity of the excitation spectrum has increased by about 3 times.

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Near-field jet characteristics of a single-hole medium-/low-pressure hydrogen injector

Zhang,

Shi

et al. 2025

Energy

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Quantitative 1-D LIBS measurements of fuel concentration in natural gas jets at high ambient pressure

Cited by 8 publications

References 55 publications

Direct comparison of ns LIBS and fs LIBS with high spatial and temporal resolution in gases

Direct comparison of ns LIBS and fs LIBS with high spatial and temporal resolution in gases

Improvement on the plasma excitation probability of aerosol particles based on aerodynamic lens

Near-field jet characteristics of a single-hole medium-/low-pressure hydrogen injector

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