TY - GEN
T1 - A new oh fluorescence signal-to-oh mole fraction conversion model formulation
AU - Angelilli, Lorenzo
AU - Ciottoli, Pietro Paolo
AU - Galassi, Riccardo Malpica
AU - Valorani, Mauro
AU - Guiberti, Thibault
AU - Hernandez Perez, Francisco
AU - Boyette, Wesley
AU - Magnotti, Gaetano
AU - Roberts, William L.
AU - Im, Hong G.
N1 - KAUST Repository Item: Exported on 2020-11-25
Acknowledgements: The authors acknowledge the support of the Italian Ministry of University and Research (MIUR) and King Abdullah University of Science and Technology. Computational resources were provided by the KAUST Supercomputing Laboratory (KSL).
PY - 2020/1/5
Y1 - 2020/1/5
N2 - In this work a non-linear model to reconstruct OH mole fraction profiles from a stand-alone experimental OH-PLIF fluorescence signal is provided. Starting from one-dimensional (1D) counter-flow flame solutions at different scalar dissipation rates and pressures for a syngas mixture, all the OH mole fraction profiles are normalized by their maximum value and made collapse into a single profile by using an exponential scaling factor. The collapsed profile is further reconstructed as the sum of a linear term and a non-linear error term. In this way, the OH mole fraction profile is entirely reconstructed in physical space. The absolute values of OH mole fraction are obtained by scaling the aforementioned profiles with the maximum value of the simulated OH mole fraction. The a priori estimation of the maximum OH mole fraction is obtained by a calibration function, which is built by correlating the simulated fluorescence and OH mole fraction maximum values. Finally, validation through 1D laminar counter-flow flames is given, and a comparison of model results for two different chemical kinetics mechanisms is examined and discussed.
AB - In this work a non-linear model to reconstruct OH mole fraction profiles from a stand-alone experimental OH-PLIF fluorescence signal is provided. Starting from one-dimensional (1D) counter-flow flame solutions at different scalar dissipation rates and pressures for a syngas mixture, all the OH mole fraction profiles are normalized by their maximum value and made collapse into a single profile by using an exponential scaling factor. The collapsed profile is further reconstructed as the sum of a linear term and a non-linear error term. In this way, the OH mole fraction profile is entirely reconstructed in physical space. The absolute values of OH mole fraction are obtained by scaling the aforementioned profiles with the maximum value of the simulated OH mole fraction. The a priori estimation of the maximum OH mole fraction is obtained by a calibration function, which is built by correlating the simulated fluorescence and OH mole fraction maximum values. Finally, validation through 1D laminar counter-flow flames is given, and a comparison of model results for two different chemical kinetics mechanisms is examined and discussed.
UR - http://hdl.handle.net/10754/665565
UR - https://arc.aiaa.org/doi/10.2514/6.2020-1279
UR - http://www.scopus.com/inward/record.url?scp=85091895127&partnerID=8YFLogxK
U2 - 10.2514/6.2020-1279
DO - 10.2514/6.2020-1279
M3 - Conference contribution
SN - 9781624105951
BT - AIAA Scitech 2020 Forum
PB - American Institute of Aeronautics and Astronautics
ER -