Journal article
Flame thermometry using laser induced grating spectroscopy of nitric oxide
- Abstract:
- A systematic study of laser-Induced thermal grating scattering (LITGS) using nitric oxide as an absorbing species is presented as a means of thermometry in air-fed combustion. The relative contributions to the scattered signal from degenerate four-wave mixing, DFWM, and from laser induced thermal grating scattering, LITGS, are studied in the time domain for NO in N2 buffer gas up to 4 bar, using a pulsed laser system to excite the (0,0) -bands of NO at 226.21 nm. LITGS signals from combustion-generated NO in a laminar, pre-mixed CH4/O2/N2 flame on an in-house constructed slot burner were used to derive temperature values as a function of O2 concentration and position in the flame at 1 bar and 2.5 bar total pressure. Temperature values consistent with the calculated adiabatic flame temperature were derived from averaged LITGS signals over 50 – 100 single shots at 10 Hz repetition rate in the range 1600 K – 2400 K with a pressure-dependent uncertainty of ±1.8% at 1 bar to ±1.4% at 2.5 bar. Based on observed signal-to-noise ratios the minimum detectable concentration of NO in the flame is estimated to be 80 ppm for a 5 second measurement time at 10 Hz repetition rate.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 2.6MB, Terms of use)
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- Publisher copy:
- 10.1007/s00340-018-6912-2
Authors
- Publisher:
- Springer
- Journal:
- Applied Physics B More from this journal
- Volume:
- 124
- Pages:
- 43
- Publication date:
- 2018-02-13
- Acceptance date:
- 2018-02-03
- DOI:
- EISSN:
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1432-0649
- ISSN:
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0946-2171
- Pubs id:
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pubs:823131
- UUID:
-
uuid:82510cc7-0abd-4189-8d30-41dd0839c2c7
- Local pid:
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pubs:823131
- Source identifiers:
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823131
- Deposit date:
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2018-02-08
Terms of use
- Copyright holder:
- Ewart et al
- Copyright date:
- 2018
- Notes:
- © The Author(s) 2018. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
- Licence:
- CC Attribution (CC BY)
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