One-dimensional equivalence ratio measurements by femtosecond laser filament-triggered discharge plasma spectroscopy
(2023) In Optics and Lasers in Engineering 160.- Abstract
Equivalence ratio measurements are of great importance for combustion systems. In this paper, femtosecond laser filament-triggered discharge plasma spectroscopy is proposed for one-dimensional equivalence ratio measurements of combustion flow fields. The optical emission spectra of femtosecond laser filament-triggered discharge plasma in methane-air premixed laminar flames were measured. The spectral intensity ratios of different species show a linear correlation with the equivalence ratio. It can be demonstrated that femtosecond laser filament-triggered discharge plasma spectroscopy can be used for equivalence ratio measurements. We investigated the effect of the temperature of the methane-air mixture on the equivalence ratio... (More)
Equivalence ratio measurements are of great importance for combustion systems. In this paper, femtosecond laser filament-triggered discharge plasma spectroscopy is proposed for one-dimensional equivalence ratio measurements of combustion flow fields. The optical emission spectra of femtosecond laser filament-triggered discharge plasma in methane-air premixed laminar flames were measured. The spectral intensity ratios of different species show a linear correlation with the equivalence ratio. It can be demonstrated that femtosecond laser filament-triggered discharge plasma spectroscopy can be used for equivalence ratio measurements. We investigated the effect of the temperature of the methane-air mixture on the equivalence ratio measurements. We further analyzed the one-dimensional spatial intensity distributions of the plasma spectral lines. The results demonstrated the capability of femtosecond laser filament-triggered discharge plasma spectroscopy for one-dimensional equivalence ratio measurements. Finally, femtosecond laser filament-triggered discharge plasma spectroscopy was applied to a methane diffusion flame and measured the one-dimensional equivalence ratios of the diffusion flame at different heights. Femtosecond laser filament-triggered discharge plasma spectroscopy offers a new method for one-dimensional equivalence ratio measurements of combustion flow fields.
(Less)
- author
- Zhu, Zhifeng ; Gao, Qiang ; Li, Bo ; Feng, Zhanyu ; Gao, Ercong ; Li, Ming and Li, Zhongshan LU
- organization
- publishing date
- 2023-01-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Discharge, Equivalence ratio, Femtosecond laser, Plasma spectrum
- in
- Optics and Lasers in Engineering
- volume
- 160
- article number
- 107237
- publisher
- Elsevier
- external identifiers
-
- scopus:85136553553
- ISSN
- 0143-8166
- DOI
- 10.1016/j.optlaseng.2022.107237
- language
- English
- LU publication?
- yes
- id
- 67115600-cefd-424c-a27e-9533ceb28c9a
- date added to LUP
- 2022-10-14 08:29:52
- date last changed
- 2023-11-21 12:10:43
@article{67115600-cefd-424c-a27e-9533ceb28c9a,
abstract = {{<p>Equivalence ratio measurements are of great importance for combustion systems. In this paper, femtosecond laser filament-triggered discharge plasma spectroscopy is proposed for one-dimensional equivalence ratio measurements of combustion flow fields. The optical emission spectra of femtosecond laser filament-triggered discharge plasma in methane-air premixed laminar flames were measured. The spectral intensity ratios of different species show a linear correlation with the equivalence ratio. It can be demonstrated that femtosecond laser filament-triggered discharge plasma spectroscopy can be used for equivalence ratio measurements. We investigated the effect of the temperature of the methane-air mixture on the equivalence ratio measurements. We further analyzed the one-dimensional spatial intensity distributions of the plasma spectral lines. The results demonstrated the capability of femtosecond laser filament-triggered discharge plasma spectroscopy for one-dimensional equivalence ratio measurements. Finally, femtosecond laser filament-triggered discharge plasma spectroscopy was applied to a methane diffusion flame and measured the one-dimensional equivalence ratios of the diffusion flame at different heights. Femtosecond laser filament-triggered discharge plasma spectroscopy offers a new method for one-dimensional equivalence ratio measurements of combustion flow fields.</p>}},
author = {{Zhu, Zhifeng and Gao, Qiang and Li, Bo and Feng, Zhanyu and Gao, Ercong and Li, Ming and Li, Zhongshan}},
issn = {{0143-8166}},
keywords = {{Discharge; Equivalence ratio; Femtosecond laser; Plasma spectrum}},
language = {{eng}},
month = {{01}},
publisher = {{Elsevier}},
series = {{Optics and Lasers in Engineering}},
title = {{One-dimensional equivalence ratio measurements by femtosecond laser filament-triggered discharge plasma spectroscopy}},
url = {{http://dx.doi.org/10.1016/j.optlaseng.2022.107237}},
doi = {{10.1016/j.optlaseng.2022.107237}},
volume = {{160}},
year = {{2023}},
}