Temperature measurements in heated gases and flames using carbon monoxide femtosecond two-photon laser-induced fluorescence
(2023) In Sensors and Actuators A: Physical 353.- Abstract
Nonintrusive temperature measurement is crucial in combustion research. Here, we propose a thermometric technique based on femtosecond two-photon laser-induced fluorescence of carbon monoxide (CO-fs-TPLIF). A femtosecond laser with a wavelength of 230 nm was used as an excitation source. Owing to its intrinsic broad bandwidth, dual vibrational bands of the B1Σ+ ← X1Σ+ transition of CO can be simultaneously excited. As a result, the fluorescence from the conventional bands (0,n) and the hot vibrational bands (1,n) of the B1Σ+ → A1Πu transition of CO can be simultaneously detected. Hence, the temperature-dependent Boltzmann distribution can be assessed... (More)
Nonintrusive temperature measurement is crucial in combustion research. Here, we propose a thermometric technique based on femtosecond two-photon laser-induced fluorescence of carbon monoxide (CO-fs-TPLIF). A femtosecond laser with a wavelength of 230 nm was used as an excitation source. Owing to its intrinsic broad bandwidth, dual vibrational bands of the B1Σ+ ← X1Σ+ transition of CO can be simultaneously excited. As a result, the fluorescence from the conventional bands (0,n) and the hot vibrational bands (1,n) of the B1Σ+ → A1Πu transition of CO can be simultaneously detected. Hence, the temperature-dependent Boltzmann distribution can be assessed from the relative fluorescence intensity related to different ro-vibrational states, and the temperature can be extracted from the analysis of the recorded fluorescence spectra. Two temperature calibration methods were developed, for the low-temperature range (298–1173 K), the rotational-state-associated bandwidths of the spectra were used; for the flame temperature range, the spectral intensity ratios between the hot vibrational bands (1-n) and the conventional bands (0-n) were used. The CO-fs-TPLIF thermometric technique features the advantages of a simple optical setup and the ability of one-dimensional measurements with high spatial resolution.
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- author
- Li, Bo LU ; Zhang, Dayuan ; Brackmann, Christian LU ; Han, Lei ; Feng, Zhanyu ; Gao, Qiang LU and Li, Zhongshan LU
- organization
- publishing date
- 2023-04
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Carbon monoxide, Femtosecond laser, Laser-induced fluorescence, Thermometry
- in
- Sensors and Actuators A: Physical
- volume
- 353
- article number
- 114212
- publisher
- Elsevier
- external identifiers
-
- scopus:85148047440
- ISSN
- 0924-4247
- DOI
- 10.1016/j.sna.2023.114212
- language
- English
- LU publication?
- yes
- id
- 0c84d6f6-0225-47b9-b29b-9f249b92f5fe
- date added to LUP
- 2023-03-03 12:32:06
- date last changed
- 2023-11-21 17:05:19
@article{0c84d6f6-0225-47b9-b29b-9f249b92f5fe, abstract = {{<p>Nonintrusive temperature measurement is crucial in combustion research. Here, we propose a thermometric technique based on femtosecond two-photon laser-induced fluorescence of carbon monoxide (CO-fs-TPLIF). A femtosecond laser with a wavelength of 230 nm was used as an excitation source. Owing to its intrinsic broad bandwidth, dual vibrational bands of the B<sup>1</sup>Σ<sup>+</sup> ← X<sup>1</sup>Σ<sup>+</sup> transition of CO can be simultaneously excited. As a result, the fluorescence from the conventional bands (0,n) and the hot vibrational bands (1,n) of the B<sup>1</sup>Σ<sup>+</sup> → A<sup>1</sup>Π<sub>u</sub> transition of CO can be simultaneously detected. Hence, the temperature-dependent Boltzmann distribution can be assessed from the relative fluorescence intensity related to different ro-vibrational states, and the temperature can be extracted from the analysis of the recorded fluorescence spectra. Two temperature calibration methods were developed, for the low-temperature range (298–1173 K), the rotational-state-associated bandwidths of the spectra were used; for the flame temperature range, the spectral intensity ratios between the hot vibrational bands (1-n) and the conventional bands (0-n) were used. The CO-fs-TPLIF thermometric technique features the advantages of a simple optical setup and the ability of one-dimensional measurements with high spatial resolution.</p>}}, author = {{Li, Bo and Zhang, Dayuan and Brackmann, Christian and Han, Lei and Feng, Zhanyu and Gao, Qiang and Li, Zhongshan}}, issn = {{0924-4247}}, keywords = {{Carbon monoxide; Femtosecond laser; Laser-induced fluorescence; Thermometry}}, language = {{eng}}, publisher = {{Elsevier}}, series = {{Sensors and Actuators A: Physical}}, title = {{Temperature measurements in heated gases and flames using carbon monoxide femtosecond two-photon laser-induced fluorescence}}, url = {{http://dx.doi.org/10.1016/j.sna.2023.114212}}, doi = {{10.1016/j.sna.2023.114212}}, volume = {{353}}, year = {{2023}}, }