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

被引：5

作者：

So, Sunghyun ^{[1
]}

Park, Jiyeon ^{[2
,3
]}

Yoo, Miyeon ^{[2
,4
]}

Hwang, Jungho ^{[5
]}

Kim, Daehae ^{[2
]}

Lee, Changyeop ^{[2
]}

机构：

[1] Agcy Def Dev, Directorate Team 2 3, Aerosp Technol Res Inst, Daejeon 34186, South Korea

[2] Korea Inst Ind Technol, Ind Environm Green Deal Agcy, Cheonan 31056, South Korea

[3] Sungkyunkwan Univ, Mech Engn Dept, Suwon 2066, South Korea

[4] Chungbuk Natl Univ, Phys Dept, Cheongju 1, South Korea

[5] Yonsei Univ, Mech Engn Dept, Seoul 03722, South Korea

来源：

OPTICS EXPRESS | 2022年 / 30卷 / 18期

关键词：

WAVELENGTH-MODULATION SPECTROSCOPY; INTERNAL PARTITION SUMS; CONCENTRATION PROFILES; COMBUSTION GASES; CALIBRATION-FREE; DIFFUSION FLAME; HIGH-SPEED; METHANE/AIR; CO; MOLECULES;

D O I：

10.1364/OE.466138

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

引用

页码：32031 / 32050

页数：20

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