Flame thermometry using laser induced grating spectroscopy of nitric oxide
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 gr...
| Үндсэн зохиолчид: | , , , |
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| Формат: | Journal article |
| Хэвлэсэн: |
Springer
2018
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| _version_ | 1826282100650672128 |
|---|---|
| author | Luers, A Salhlberg, A Hochgreb, S Ewart, P |
| author_facet | Luers, A Salhlberg, A Hochgreb, S Ewart, P |
| author_sort | Luers, A |
| collection | OXFORD |
| description | 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. |
| first_indexed | 2024-03-07T00:38:45Z |
| format | Journal article |
| id | oxford-uuid:82510cc7-0abd-4189-8d30-41dd0839c2c7 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T00:38:45Z |
| publishDate | 2018 |
| publisher | Springer |
| record_format | dspace |
| spelling | oxford-uuid:82510cc7-0abd-4189-8d30-41dd0839c2c72022-03-26T21:36:30ZFlame thermometry using laser induced grating spectroscopy of nitric oxideJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:82510cc7-0abd-4189-8d30-41dd0839c2c7Symplectic Elements at OxfordSpringer2018Luers, ASalhlberg, AHochgreb, SEwart, PA 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. |
| spellingShingle | Luers, A Salhlberg, A Hochgreb, S Ewart, P Flame thermometry using laser induced grating spectroscopy of nitric oxide |
| title | Flame thermometry using laser induced grating spectroscopy of nitric oxide |
| title_full | Flame thermometry using laser induced grating spectroscopy of nitric oxide |
| title_fullStr | Flame thermometry using laser induced grating spectroscopy of nitric oxide |
| title_full_unstemmed | Flame thermometry using laser induced grating spectroscopy of nitric oxide |
| title_short | Flame thermometry using laser induced grating spectroscopy of nitric oxide |
| title_sort | flame thermometry using laser induced grating spectroscopy of nitric oxide |
| work_keys_str_mv | AT luersa flamethermometryusinglaserinducedgratingspectroscopyofnitricoxide AT salhlberga flamethermometryusinglaserinducedgratingspectroscopyofnitricoxide AT hochgrebs flamethermometryusinglaserinducedgratingspectroscopyofnitricoxide AT ewartp flamethermometryusinglaserinducedgratingspectroscopyofnitricoxide |