Simultaneous measurement of OH radical, H2O concentration, and temperature in a premixed CH4/air flame using TDLAS with an improved analysis method

Sunghyun So; Jiyeon Park; Miyeon Yoo; Jungho Hwang; Daehae Kim; Changyeop Lee

doi:10.1364/OE.466138

Simultaneous measurement of OH radical, H₂O concentration, and temperature in a premixed CH₄/air flame using TDLAS with an improved analysis method

Sunghyun So, Jiyeon Park, Miyeon Yoo, Jungho Hwang, Daehae Kim, Changyeop Lee

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The OH radical concentration was measured by applying tunable diode laser absorption spectroscopy, which is an in situ optical method. An optical absorption region (P7.5ff transition at 1502.7 nm) of the OH radical was selected in the near-infrared range to measure the OH radicals quantitatively in premixed CH₄/air flames. An improved direct absorption spectroscopy (DAS) method based on wavelength division multiplexing was proposed to extract the H₂O absorption signal that interfered with the OH light absorption signal, and the integral intensity of OH* chemiluminescence was compared to the measured OH radical concentration based on the improved DAS method.

Original language	English
Pages (from-to)	32031-32050
Number of pages	20
Journal	Optics Express
Volume	30
Issue number	18
DOIs	https://doi.org/10.1364/OE.466138
Publication status	Published - 2022 Aug 29

Bibliographical note

Funding Information:
Korea Institute of Science and Technology (2E31980-22-P009).

Publisher Copyright:
© 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

Access to Document

10.1364/OE.466138

Cite this

@article{f4099c970651434f9df0cd8b7dd00242,

title = "Simultaneous measurement of OH radical, H2O concentration, and temperature in a premixed CH4/air flame using TDLAS with an improved analysis method",

abstract = "The OH radical concentration was measured by applying tunable diode laser absorption spectroscopy, which is an in situ optical method. An optical absorption region (P7.5ff transition at 1502.7 nm) of the OH radical was selected in the near-infrared range to measure the OH radicals quantitatively in premixed CH4/air flames. An improved direct absorption spectroscopy (DAS) method based on wavelength division multiplexing was proposed to extract the H2O absorption signal that interfered with the OH light absorption signal, and the integral intensity of OH* chemiluminescence was compared to the measured OH radical concentration based on the improved DAS method.",

author = "Sunghyun So and Jiyeon Park and Miyeon Yoo and Jungho Hwang and Daehae Kim and Changyeop Lee",

note = "Funding Information: Korea Institute of Science and Technology (2E31980-22-P009). Publisher Copyright: {\textcopyright} 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.",

year = "2022",

month = aug,

day = "29",

doi = "10.1364/OE.466138",

language = "English",

volume = "30",

pages = "32031--32050",

journal = "Optics Express",

issn = "1094-4087",

publisher = "The Optical Society",

number = "18",

}

TY - JOUR

T1 - Simultaneous measurement of OH radical, H2O concentration, and temperature in a premixed CH4/air flame using TDLAS with an improved analysis method

AU - So, Sunghyun

AU - Park, Jiyeon

AU - Yoo, Miyeon

AU - Hwang, Jungho

AU - Kim, Daehae

AU - Lee, Changyeop

N1 - Funding Information: Korea Institute of Science and Technology (2E31980-22-P009). Publisher Copyright: © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

PY - 2022/8/29

Y1 - 2022/8/29

N2 - The OH radical concentration was measured by applying tunable diode laser absorption spectroscopy, which is an in situ optical method. An optical absorption region (P7.5ff transition at 1502.7 nm) of the OH radical was selected in the near-infrared range to measure the OH radicals quantitatively in premixed CH4/air flames. An improved direct absorption spectroscopy (DAS) method based on wavelength division multiplexing was proposed to extract the H2O absorption signal that interfered with the OH light absorption signal, and the integral intensity of OH* chemiluminescence was compared to the measured OH radical concentration based on the improved DAS method.

AB - The OH radical concentration was measured by applying tunable diode laser absorption spectroscopy, which is an in situ optical method. An optical absorption region (P7.5ff transition at 1502.7 nm) of the OH radical was selected in the near-infrared range to measure the OH radicals quantitatively in premixed CH4/air flames. An improved direct absorption spectroscopy (DAS) method based on wavelength division multiplexing was proposed to extract the H2O absorption signal that interfered with the OH light absorption signal, and the integral intensity of OH* chemiluminescence was compared to the measured OH radical concentration based on the improved DAS method.

UR - http://www.scopus.com/inward/record.url?scp=85136170268&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85136170268&partnerID=8YFLogxK

U2 - 10.1364/OE.466138

DO - 10.1364/OE.466138

M3 - Article

C2 - 36242273

AN - SCOPUS:85136170268

SN - 1094-4087

VL - 30

SP - 32031

EP - 32050

JO - Optics Express

JF - Optics Express

IS - 18

ER -