W. Mayer, STABILITY OF A LIQUID JET WITH REGARD TO ATOMIZATION AND MIXING IN ROCKETS ENGINES, Zeitschrift fur Flugwissenschaften und Weltraumforschung, 18(2), 1994, pp. 120-132
Coaxial Injectors are used for the injection, atomization and mixing o
f propellants in cryogenic H-2/O2 rocket engines. Thereby, a round liq
uid oxygen jet, whose behaviour is in focus of this article, is atomiz
ed by a fast, coaxial hydrogen jet. The behaviour of the liquid jet un
der the influence of the aerodynamic forces is a decisive part of the
global propellant atomization and mixing process. With the assumption
that the jet disturbances are infinitesimally small it is possible to
find analytical algorithms to describe the jet deformation. The influe
nce of real effects as finite amplitude and deformation of surface wav
es and droplet formation are calculated using a two-dimensional numeri
cal procedure. The result of these non-linear simulations are in agree
ment with experimental evidence and form a valuable part to understand
the atomization process. The investigations serve as a basis for the
development of an atomization model with the final aim to integrate th
is into models for global processes as e.g. the flow in a combustion c
hamber.