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One-dimensional full-range mixture fraction measurements with femtosecond laser-induced plasma spectroscopy

Li, Bo LU ; Zhang, Dayuan ; Gao, Qiang LU and Li, Zhongshan LU (2020) In Experiments in Fluids 61(2).
Abstract

Abstract: Femtosecond laser-induced plasma spectroscopy (FLIPS) was performed to achieve full-range mixture fraction measurements in non-reacting CH4/air flow fields. A femtosecond laser at 800 nm was used to generate a plasma channel with a uniform intensity distribution. Through measuring spatially resolved spectra and calibration, we found that the spectral intensity ratios of CH (431 nm)/N2 (337 nm), CH (431 nm)/N2 (357 nm), C2 (516.5 nm)/N2 (337 nm), C2 (516.5 nm)/N2 (357 nm) and CH (431 nm)/O (777 nm) could be used to realize mixture fraction measurements, and the first four intensity ratios can achieve full-range mixture fraction measurements.... (More)

Abstract: Femtosecond laser-induced plasma spectroscopy (FLIPS) was performed to achieve full-range mixture fraction measurements in non-reacting CH4/air flow fields. A femtosecond laser at 800 nm was used to generate a plasma channel with a uniform intensity distribution. Through measuring spatially resolved spectra and calibration, we found that the spectral intensity ratios of CH (431 nm)/N2 (337 nm), CH (431 nm)/N2 (357 nm), C2 (516.5 nm)/N2 (337 nm), C2 (516.5 nm)/N2 (357 nm) and CH (431 nm)/O (777 nm) could be used to realize mixture fraction measurements, and the first four intensity ratios can achieve full-range mixture fraction measurements. Furthermore, through quantitative analysis of the distribution along the plasma channel, we analyzed the one-dimensional measurement capability of FLIPS. The main advantages of FLIPS for mixture fraction measurements are one-dimensional quantitative measurement, full-range measurement, high spatial resolution and no Bremsstrahlung interference. Graphic abstract: [Figure not available: see fulltext.].

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Experiments in Fluids
volume
61
issue
2
article number
33
publisher
Springer
external identifiers
  • scopus:85077794508
ISSN
0723-4864
DOI
10.1007/s00348-020-2877-0
language
English
LU publication?
yes
id
8d0919ac-aad3-4de5-b93c-dd2bcf7e75da
date added to LUP
2020-01-24 08:56:42
date last changed
2025-10-14 09:12:00
@article{8d0919ac-aad3-4de5-b93c-dd2bcf7e75da,
  abstract     = {{<p>Abstract: Femtosecond laser-induced plasma spectroscopy (FLIPS) was performed to achieve full-range mixture fraction measurements in non-reacting CH<sub>4</sub>/air flow fields. A femtosecond laser at 800 nm was used to generate a plasma channel with a uniform intensity distribution. Through measuring spatially resolved spectra and calibration, we found that the spectral intensity ratios of CH (431 nm)/N<sub>2</sub> (337 nm), CH (431 nm)/N<sub>2</sub> (357 nm), C<sub>2</sub> (516.5 nm)/N<sub>2</sub> (337 nm), C<sub>2</sub> (516.5 nm)/N<sub>2</sub> (357 nm) and CH (431 nm)/O (777 nm) could be used to realize mixture fraction measurements, and the first four intensity ratios can achieve full-range mixture fraction measurements. Furthermore, through quantitative analysis of the distribution along the plasma channel, we analyzed the one-dimensional measurement capability of FLIPS. The main advantages of FLIPS for mixture fraction measurements are one-dimensional quantitative measurement, full-range measurement, high spatial resolution and no Bremsstrahlung interference. Graphic abstract: [Figure not available: see fulltext.].</p>}},
  author       = {{Li, Bo and Zhang, Dayuan and Gao, Qiang and Li, Zhongshan}},
  issn         = {{0723-4864}},
  language     = {{eng}},
  number       = {{2}},
  publisher    = {{Springer}},
  series       = {{Experiments in Fluids}},
  title        = {{One-dimensional full-range mixture fraction measurements with femtosecond laser-induced plasma spectroscopy}},
  url          = {{http://dx.doi.org/10.1007/s00348-020-2877-0}},
  doi          = {{10.1007/s00348-020-2877-0}},
  volume       = {{61}},
  year         = {{2020}},
}