Chorey, D and Koegl, M and Boggavarapu, P and Bauer, FJ and Zigan, L and Will, S and Ravikrishna, RV and Deshmukh, D and Mishra, YN (2021) 3D mapping of polycyclic aromatic hydrocarbons, hydroxyl radicals, and soot volume fraction in sooting flames using FRAME technique. In: Applied Physics B: Lasers and Optics, 127 (11).
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Abstract
We report the three-dimensional (3D) mapping of polycyclic aromatic hydrocarbons (PAHs), soot, and hydroxyl radicals (OH) in ethylene/air diffusion flames. A structured illumination-based frequency recognition algorithm for multiple exposures (FRAME) approach is combined with sample translation to intersect the flame in several two-dimensional planes. The FRAME technique has been used for recording a snapshot of multiple species on a single camera. It relies on extracting the amplitude of spatial modulation of two or more probed species encoded on a single sub-image. Here, the FRAME technique is first applied for simultaneous imaging of PAH by laser-induced fluorescence (PAH-LIF) and soot by laser-induced incandescence (LII). Sequentially, it is employed for simultaneous mapping of OH-LIF and soot-LII. The LII signal is converted to absolute soot volume fraction (fv) maps using a line-of-sight light extinction measurement. Finally, we have demonstrated the approach for layer-wise 2D imaging of soot volume fraction and averaged 3D mapping of multiple species.
| Item Type: | Journal Article |
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| Publication: | Applied Physics B: Lasers and Optics |
| Publisher: | Springer Science and Business Media Deutschland GmbH |
| Additional Information: | The copyright for this article belongs to the Authors. |
| Keywords: | Dust; Ethylene; Light extinction; Mapping; Mineral oils; Soot; Volume fraction 3-D mapping; Diffusion Flame; Hydrocarbon radicals; Hydroxyl radicals; Laser-induced incandescence; Multiple exposure; Multiple species; Recognition algorithm; Soot volume fraction; Sooting flames Polycyclic aromatic hydrocarbons |
| Department/Centre: | Division of Mechanical Sciences > Mechanical Engineering |
| Date Deposited: | 09 Jun 2023 11:02 |
| Last Modified: | 09 Jun 2023 11:02 |
| URI: | https://eprints.iisc.ac.in/id/eprint/81846 |
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