Iso-surface de dégagement de chaleur colorée par les fractions massiques de chaque composant du carburant dans la configuration SSB du DLR. Comparaison entre Jet-A1 conventionnel, Alcohol-To-Jet (ATJ) et carburant à haute-teneur en aromatiques.
To reduce the impact of aviation on climate change, the aviation industry is committed to replacing petroleum-based kerosene with fuels of non-fossil origin. Light or non-carbon-based synthetic fuels such as methane, hydrogen or ammonia are still at a low level of technological maturity, as their use requires major modifications to existing engines. In contrast, sustainable aviation fuels (SAFs) derived from renewable sources are directly usable, and make it possible to eliminate part of the greenhouse gas emissions due to their chemical composition and smaller footprint over their life cycle. However, the impact of SAFs on engine operation is not yet well characterized, particularly in terms of lean extinction limits, combustion instabilities and pollutant emissions.
In the high-fidelity, massively parallel AVBP code developed at CERFACS, our team relied on the Large-Scale Simulation approach to reactive turbulent flows and developed a methodology capable of reproducing fuel effects thanks to a multi-component description and semi-detailed combustion chemistry. This model has been evaluated and validated by comparison with experimental data in laboratory configurations at DLR (SSB) and ONERA (LOTHAR) as part of the European JETSCREEN project. Building on these results, CERFACS and SAFRAN HE have pro- posed the EuroHPC ISAF project, selected in March 2023 for an allocation of 44 MhCPU on the LUMI-C computer. The aim is to continue SAFs modeling and validation efforts for the lean extinction limit and pollutant emissions, and to apply the model to industrial aeronautical chambers.
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