LII-lidar: range-resolved backward picosecond laser-induced incandescence
(2014) In Applied Physics B 115(1). p.111-121- Abstract
- A novel concept for remote in situ detection of soot emissions by a combination of laser-induced incandescence (LII) and light detection and ranging (lidar) is presented. A lidar setup based on a picosecond Nd:YAG laser and time-resolved signal detection in the backward direction was used for LII measurements in sooty premixed ethylene-air flames. Measurements of LII-lidar signal versus laser fluence and flame equivalence ratio showed good qualitative agreement with data reported in literature. The LII-lidar signal showed a decay consisting of two components, with lifetimes of typically 20 and 70 ns, attributed to soot sublimation and conductive cooling, respectively. Theoretical considerations and analysis of the LII-lidar signal showed... (More)
- A novel concept for remote in situ detection of soot emissions by a combination of laser-induced incandescence (LII) and light detection and ranging (lidar) is presented. A lidar setup based on a picosecond Nd:YAG laser and time-resolved signal detection in the backward direction was used for LII measurements in sooty premixed ethylene-air flames. Measurements of LII-lidar signal versus laser fluence and flame equivalence ratio showed good qualitative agreement with data reported in literature. The LII-lidar signal showed a decay consisting of two components, with lifetimes of typically 20 and 70 ns, attributed to soot sublimation and conductive cooling, respectively. Theoretical considerations and analysis of the LII-lidar signal showed that the derivative was proportional to the maximum value, which is an established measure of soot volume fraction. Utilizing this, differentiation of LII-lidar data gave profiles representing soot volume fraction with a range resolution of similar to 16 cm along the laser beam propagation axis. The accuracy of the evaluated LII-profiles was confirmed by comparison with LII-data measured simultaneously employing conventional right-angle detection. Thus, LII-lidar provides range-resolved single-ended detection, resourceful when optical access is restricted, extending the LII technique and opening up new possibilities for laser-based diagnostics of soot and other carbonaceous particles. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4410905
- author
- Kaldvee, Billy LU ; Brackmann, Christian LU ; Aldén, Marcus LU and Bood, Joakim LU
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Applied Physics B
- volume
- 115
- issue
- 1
- pages
- 111 - 121
- publisher
- Springer
- external identifiers
-
- wos:000332853000014
- scopus:84899430207
- ISSN
- 0946-2171
- DOI
- 10.1007/s00340-013-5581-4
- language
- English
- LU publication?
- yes
- id
- 328081e1-5294-4763-96b5-b82ea3f833a6 (old id 4410905)
- date added to LUP
- 2016-04-01 10:09:51
- date last changed
- 2022-02-02 07:02:11
@article{328081e1-5294-4763-96b5-b82ea3f833a6,
abstract = {{A novel concept for remote in situ detection of soot emissions by a combination of laser-induced incandescence (LII) and light detection and ranging (lidar) is presented. A lidar setup based on a picosecond Nd:YAG laser and time-resolved signal detection in the backward direction was used for LII measurements in sooty premixed ethylene-air flames. Measurements of LII-lidar signal versus laser fluence and flame equivalence ratio showed good qualitative agreement with data reported in literature. The LII-lidar signal showed a decay consisting of two components, with lifetimes of typically 20 and 70 ns, attributed to soot sublimation and conductive cooling, respectively. Theoretical considerations and analysis of the LII-lidar signal showed that the derivative was proportional to the maximum value, which is an established measure of soot volume fraction. Utilizing this, differentiation of LII-lidar data gave profiles representing soot volume fraction with a range resolution of similar to 16 cm along the laser beam propagation axis. The accuracy of the evaluated LII-profiles was confirmed by comparison with LII-data measured simultaneously employing conventional right-angle detection. Thus, LII-lidar provides range-resolved single-ended detection, resourceful when optical access is restricted, extending the LII technique and opening up new possibilities for laser-based diagnostics of soot and other carbonaceous particles.}},
author = {{Kaldvee, Billy and Brackmann, Christian and Aldén, Marcus and Bood, Joakim}},
issn = {{0946-2171}},
language = {{eng}},
number = {{1}},
pages = {{111--121}},
publisher = {{Springer}},
series = {{Applied Physics B}},
title = {{LII-lidar: range-resolved backward picosecond laser-induced incandescence}},
url = {{http://dx.doi.org/10.1007/s00340-013-5581-4}},
doi = {{10.1007/s00340-013-5581-4}},
volume = {{115}},
year = {{2014}},
}