Numerical Study of the Injection Parameters Impact on the Efficiency of a Liquid Rocket Engine

This chapter analyzes the effect of various parameters (such as droplet injection velocity components by a swirl injector in a cylindrical coordinate system and droplet size distribution parameters) of fuel injection in an oxygen-kerosene rocket engine on the efficiency of the workflow. The study was conducted for two cases of application of the wall film cooling of the combustion chamber and without it. It is shown that the parameters for fuel injection in the case of using a wall film cooling effect in an unobvious way. A description of the object of study, the main features of the numerical experiment, and models used in the course of the study are given, as well as, the results are analyzed and recommendations on their use and further research in this area are formulated. The use of the obtained results allows to form a technical task for the design of a mixing head that implements optimal combustion conditions in the combustion chamber. Verification of the calculated data was carried out using the results of experimental studies conducted at Moscow Aviation Institute (National Research University) at the Department of Rocket Engines. This experimental work was carried out using a specially designed DMTMAI-200OK rocket engine.