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Title: Multiparameter spatio-thermochemical probing of flame–wall interactions advanced with coherent Raman imaging

Ultrabroadband coherent anti-Stokes Ra man spectroscopy (CARS) has been developed for one -dimensional imaging of temperature and major species distributions simultaneously in the near-wall region of a methane/air flame supported on a side-wall-quenching (SWQ) burner. Automatic temporal and spatial overlap of the ~7 femtosecond pump and Stokes pulses is achieved utilizing a two-beam CARS phase-matching scheme, and the crossed ~75 picosecond probe beam provide s excellent spatial sectioning of the probed location. Concurrent detection of N 2, O 2, H 2, CO, CO 2, and CH 4 is demonstrated while high-fidelity flame thermometry is assessed from the N 2 pure rotational S-branch in a one-dimensional -CARS imaging configuration. A methane/air premixed flame at lean, stoichiometric, and rich conditions ( Φ = 0.83, 1.0 , and 1.2) and Reynolds number = 5,000 is probed as it quenches against a cooled steel side- wall parallel to the flow providing a persistent flame-wall interaction. Here, an imaging resolution of better than 40 μm is achieved across the field -of-view, thus allowing thermochemical states (temperature and major species) of the thermal boundary layer to be resolved to within ~30 μm of the interface.
Authors:
 [1] ;  [2] ;  [1] ;  [2] ;  [1]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  2. Technische Univ. Darmstadt (Germany). Institute of Reactive Flows and Diagnostics (RSM)
Publication Date:
Report Number(s):
SAND-2016-0939J
Journal ID: ISSN 1540-7489; 619046
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Proceedings of the Combustion Institute
Additional Journal Information:
Journal Name: Proceedings of the Combustion Institute; Journal ID: ISSN 1540-7489
Publisher:
Elsevier
Research Org:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; time-resolved spectroscopy; CARS; coherent imaging; thermochemical states; flame-wall interactions; combustion diagnostics
OSTI Identifier:
1251595
Alternate Identifier(s):
OSTI ID: 1419566

Bohlin, Gustav Alexis, Jainski, Christopher, Patterson, Brian D., Dreizler, Andreas, and Kliewer, Christopher Jesse. Multiparameter spatio-thermochemical probing of flame–wall interactions advanced with coherent Raman imaging. United States: N. p., Web. doi:10.1016/j.proci.2016.07.062.
Bohlin, Gustav Alexis, Jainski, Christopher, Patterson, Brian D., Dreizler, Andreas, & Kliewer, Christopher Jesse. Multiparameter spatio-thermochemical probing of flame–wall interactions advanced with coherent Raman imaging. United States. doi:10.1016/j.proci.2016.07.062.
Bohlin, Gustav Alexis, Jainski, Christopher, Patterson, Brian D., Dreizler, Andreas, and Kliewer, Christopher Jesse. 2016. "Multiparameter spatio-thermochemical probing of flame–wall interactions advanced with coherent Raman imaging". United States. doi:10.1016/j.proci.2016.07.062. https://www.osti.gov/servlets/purl/1251595.
@article{osti_1251595,
title = {Multiparameter spatio-thermochemical probing of flame–wall interactions advanced with coherent Raman imaging},
author = {Bohlin, Gustav Alexis and Jainski, Christopher and Patterson, Brian D. and Dreizler, Andreas and Kliewer, Christopher Jesse},
abstractNote = {Ultrabroadband coherent anti-Stokes Ra man spectroscopy (CARS) has been developed for one -dimensional imaging of temperature and major species distributions simultaneously in the near-wall region of a methane/air flame supported on a side-wall-quenching (SWQ) burner. Automatic temporal and spatial overlap of the ~7 femtosecond pump and Stokes pulses is achieved utilizing a two-beam CARS phase-matching scheme, and the crossed ~75 picosecond probe beam provide s excellent spatial sectioning of the probed location. Concurrent detection of N2, O2, H2, CO, CO2, and CH4 is demonstrated while high-fidelity flame thermometry is assessed from the N2 pure rotational S-branch in a one-dimensional -CARS imaging configuration. A methane/air premixed flame at lean, stoichiometric, and rich conditions ( Φ = 0.83, 1.0 , and 1.2) and Reynolds number = 5,000 is probed as it quenches against a cooled steel side- wall parallel to the flow providing a persistent flame-wall interaction. Here, an imaging resolution of better than 40 μm is achieved across the field -of-view, thus allowing thermochemical states (temperature and major species) of the thermal boundary layer to be resolved to within ~30 μm of the interface.},
doi = {10.1016/j.proci.2016.07.062},
journal = {Proceedings of the Combustion Institute},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {8}
}