Coaxial injection in LOX/H2 cryotechnic rocket engines (such as VULCAIN) has proved
efficient and reliable. However, various aspects of the functioning of these injectors are still
poorly understood. The mechanisms controlling the atomisation of the liquid phase for
instance are subject to controversy (Hopfinger-2001), and the validity of the extrapolation to
engine conditions of scaling laws identified in laboratory experiments is not established.
Furthermore, the description of the spray evolution with downstream distance from the …