Over the years, pollution has become a main concern and more stringent emissions legislations have been introduced to reduce the influence of aviation on environmental and human health. Despite the development of numerous low emissions combustion technologies, it is necessary to switch to more sustainable fuels to replace fossil fuels to meet long term emissions targets. Liquid hydrogen has been identified as one of the most promising alternative fuels. However, its introduction in civil aviation has been slowed down by issues of different nature. Due to its properties, in particular high flame speed and stoichiometric flame temperature, a significant redesign of the combustion system is required.