Resumen
Some of the most prominent decarbonization efforts in aviation and power generation sectors deal with the combustion of
hydrogen in gas turbines. Although this is not a new topic, its large-scale use as a single fuel is now part of the major plans
of original equipment manufacturers and, especially in aviation, low NOx efficient and stable burners with hydrogen are still
at a low Technology Readiness Level (TRL). DIALOGUE program sets up an ambitious plan with the main objective of
comparing three hydrogen burner concepts ranging from premixed to micro-mixing diffusion over multi-regime pilot-assisted
flames. By assessing the performance of each of the selected burners, conclusions will be derived that elucidate the
governing factors for each concept and will help the industry to decide upon the most promising one. To achieve this goal,
advanced state-of-the-art tools will be used. Experimental environments range from atmospheric pressure burners up to
unique high-pressure high-temperature test rigs, which can reach representative engine operating conditions. Advanced
optical diagnostics to be used comprise highspeed visualization tools, spectroscopic as well as laser-induced fluorescence
techniques. Finally, computational fluid-dynamics tools make extensive use of detailed chemistry as well as advanced
turbulence-chemistry interaction models within a Large Eddy Simulation turbulence approach. An initial comparison of the
burner concepts at atmospheric conditions and a detailed assessment of the performance and flame characteristics and
stability will show the main phenomena governing each concept and will also provide information for the validation of the
numerical tools. After that, an optimization step of the burners will be carried out, which will extend these concepts towards
high-pressure operation. Experimental testing in the corresponding pressurized vessel will close the assessment at realistic
engine operating conditions. The synergy created using both experimental and numerical tools will make it possible to
quantitatively support the comparison of the investigated burner concepts.
