Data Release – February 2026
Reynolds numbers: D-24000, E-32000, F-36000
Primary Contacts:
Gaetano Magnotti (Gaetano.magnotti@coria.fr)
Hao Tang (htang2@uottawa.ca)
Abstract:
The Sydney piloted flames D-E-F, were extensively used to validate numerical models of methane, and more recently DME combustion. This study extends the approach to partially cracked ammonia combustion, by investigating three piloted NH₃/H₂/N₂-air turbulent flames for varying Reynolds numbers. As the Reynolds number approaches the blow-off value, localized extinction events become more frequent, providing detailed data to investigated turbulence-chemistry interaction.
The detailed thermochemical structure of the flames is resolved using a combination of 1D Raman/Rayleigh scattering and OH/NH₂ laser-induced fluorescence (LIF), capturing key species (NH₃, H₂, O₂, N₂, H₂O, OH, NH₂), mixture fraction, NH₃/H₂ ratios, and temperature distributions. These measurements are used to analyze flame structure in mixture fraction and temperature space as well as physical space. Probability density functions (PDFs) provide insights on local extinction behavior, while conditional means of the NH3/H2 ratio yield insights on differential diffusion.
References:
Tang H, Al Hadi Z, Barlow R, Magnotti G. Turbulence-chemistry interactions in piloted partially premixed cracked ammonia-air flames with high Reynolds numbers. Combust Flame 2025;279:114303. https://doi.org/10.1016/J.COMBUSTFLAME.2025.114303.
Tang H, Barlow R, Magnotti G. Local extinction in piloted turbulent partially premixed ammonia/hydrogen/nitrogen-air jet flames. Proceedings of the Combustion Institute 2024;40:105472. https://doi.org/10.1016/J.PROCI.2024.105472.
Documentation and Scalar Data: