In recent years launching companies have been concentrating their resources toward developing reusable rocket solutions with the aim to both improve performances and drastically reduce the costs, transforming spaceflight from an exclusive, exorbitant endeavour into a more accessible and economically viable one. In order to support this ambitious goal, innovative manufacturing techniques must be explored to meet the demands for high performance, cost reduction and shorter production timelines. Additionally, allowing scalability of such technologies plays a strategic role in the development of future rocket engines, enabling next-generation launch vehicles to increase their payload capacity together with orbit insertion capabilities. Within this framework, the present thesis explores the field of liquid rocket propulsion and has been carried out in collaboration with Avio S.p.a.