Highly efficient and clean burner technologies that enable fully premixed combustion are becoming increasingly important. At the same time, the interest in CO₂-neutral fuels such as hydrogen, ammonia or synthetic, sustainably produced fuels is growing. A stable and controllable flame remains essential in many applications. However, premixed flames can have undesirable effects.  Of particular importance is the effect of flashback, where the flame moves from the combustion chamber into the upstream premixing zone of the burner and damages it.

At the ITV, the stability limits of hydrogen, ammonia and synthetically produced fuels are investigated under application-relevant conditions. The stability limits of swirl-free premixed hydrogen/ammonia premix flames have already been investigated in the past. Particular attention was paid to the influence of H₂/NH₃ mixture compositions and preheating temperatures on flame stability. The knowledge gained will help to identify the potential and risks of sustainable fuels.