Ling, Tianxiang, Chen, Guoqing, Hossain, Md. Moinul, Qi, Qi, Zhang, Biao, Xu, Chuanlong (2024) Flame soot absorption coefficient and temperature reconstruction through line-of-sight attenuation and light field imaging. Optics and Lasers in Engineering, 178 . Article Number 108219. ISSN 0143-8166. E-ISSN 1873-0302. (In press) (doi:10.1016/j.optlaseng.2024.108219) (KAR id:105503)
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Official URL: https://doi.org/10.1016/j.optlaseng.2024.108219 |
Abstract
The accuracy and efficiency of 3-D flame temperature field reconstruction using the light field imaging technique heavily depend on soot radiation characteristics. In this study, we employ the line-of-sight attenuation method to reconstruct the soot absorption coefficient distribution in a pure absorbing flame. Utilizing these soot absorption coefficients, the radiative transfer equation is effectively transformed within the framework of the light field imaging technique into a linear inverse problem and also outlines the flame boundary. This proposed strategy reduces the unwanted detection rays significantly, thus eliminating the extensive computational processing. Consequently, the proposed approach substantially enhances the accuracy and efficiency of flame temperature reconstruction. Numerical simulations were carried out on a bimodal asymmetric flame to validate the noise tolerance capabilities, investigate the effects of varying voxel numbers on flame division and carry out a comparative study. Experimental studies were also conducted to reconstruct flame temperature and soot absorption coefficient distributions under different combustion operating conditions. Thermocouple measurements were performed and compared with the reconstructed temperatures. Outcomes achieved from both numerical simulations and experimental studies demonstrate the feasibility, accuracy and robustness of the proposed method.
Item Type: | Article |
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DOI/Identification number: | 10.1016/j.optlaseng.2024.108219 |
Uncontrolled keywords: | Line-of-sight attenuation; Light field imaging; Soot absorption coefficient; Flame temperature; 3-D reconstruction |
Subjects: |
Q Science Q Science > Q Science (General) |
Divisions: | Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts |
Funders: | National Natural Science Foundation of China (https://ror.org/01h0zpd94) |
Depositing User: | Moinul Hossain |
Date Deposited: | 01 Apr 2024 12:05 UTC |
Last Modified: | 03 Apr 2024 03:37 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/105503 (The current URI for this page, for reference purposes) |
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