Advanced

Instantaneous one-dimensional equivalence ratio measurements in methane/air mixtures using femtosecond laser-induced plasma spectroscopy

Zhang, Dayuan; Gao, Qiang LU ; Li, Bo LU ; Zhu, Zhifeng and Li, Zhongshan LU (2019) In Optics Express 27(3). p.2159-2169
Abstract

Equivalence ratio is one of the most significant parameters in combustion flow fields. In this paper, femtosecond laser-induced plasma spectroscopy (FLIPS) technique for instantaneous one-dimensional local equivalence ratio measurements were performed. By measuring the spatially resolved spectra of FLIPS, we found that the spectral peak area ratios of CH (431 nm)/N2 (337 nm), CH (431 nm)/N2 (357 nm), and CH (431 nm)/O (777 nm) can be utilized to achieve one-dimensional local equivalence ratio measurements. Among them, the CH peak at ~431 nm and the O peak at ~777 nm are strong enough to be used to achieve single-shot measurements, which is important to turbulent flow fields. Furthermore, systematic experiments were... (More)

Equivalence ratio is one of the most significant parameters in combustion flow fields. In this paper, femtosecond laser-induced plasma spectroscopy (FLIPS) technique for instantaneous one-dimensional local equivalence ratio measurements were performed. By measuring the spatially resolved spectra of FLIPS, we found that the spectral peak area ratios of CH (431 nm)/N2 (337 nm), CH (431 nm)/N2 (357 nm), and CH (431 nm)/O (777 nm) can be utilized to achieve one-dimensional local equivalence ratio measurements. Among them, the CH peak at ~431 nm and the O peak at ~777 nm are strong enough to be used to achieve single-shot measurements, which is important to turbulent flow fields. Furthermore, systematic experiments were performed by using FLIPS in both laminar and turbulent flow fields. The FLIPS technique features the abilities of instantaneous one-dimensional quantitative measurements, high spatial resolution, and no Bremsstrahlung interference.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Optics Express
volume
27
issue
3
pages
11 pages
publisher
OSA
external identifiers
  • scopus:85061015805
ISSN
1094-4087
DOI
10.1364/OE.27.002159
language
English
LU publication?
yes
id
46a46579-d08a-45c1-b283-1a2e0e73c6b0
date added to LUP
2019-02-11 12:00:24
date last changed
2019-02-11 12:00:24
@article{46a46579-d08a-45c1-b283-1a2e0e73c6b0,
  abstract     = {<p>Equivalence ratio is one of the most significant parameters in combustion flow fields. In this paper, femtosecond laser-induced plasma spectroscopy (FLIPS) technique for instantaneous one-dimensional local equivalence ratio measurements were performed. By measuring the spatially resolved spectra of FLIPS, we found that the spectral peak area ratios of CH (431 nm)/N<sub>2</sub> (337 nm), CH (431 nm)/N<sub>2</sub> (357 nm), and CH (431 nm)/O (777 nm) can be utilized to achieve one-dimensional local equivalence ratio measurements. Among them, the CH peak at ~431 nm and the O peak at ~777 nm are strong enough to be used to achieve single-shot measurements, which is important to turbulent flow fields. Furthermore, systematic experiments were performed by using FLIPS in both laminar and turbulent flow fields. The FLIPS technique features the abilities of instantaneous one-dimensional quantitative measurements, high spatial resolution, and no Bremsstrahlung interference.</p>},
  author       = {Zhang, Dayuan and Gao, Qiang and Li, Bo and Zhu, Zhifeng and Li, Zhongshan},
  issn         = {1094-4087},
  language     = {eng},
  month        = {02},
  number       = {3},
  pages        = {2159--2169},
  publisher    = {OSA},
  series       = {Optics Express},
  title        = {Instantaneous one-dimensional equivalence ratio measurements in methane/air mixtures using femtosecond laser-induced plasma spectroscopy},
  url          = {http://dx.doi.org/10.1364/OE.27.002159},
  volume       = {27},
  year         = {2019},
}