Effect of oxidative jet flow in throat and divergence section on nozzle performance^☆

In order to study the effect of oxidative injection on thrust vector angle, secondary combustion efficiency and combustion chamber pressure in nozzle throat and divergence section. In this paper, the primary gas with combustible components is selected, and inert gas and pure oxygen are injected into the divergence section and the throat respectively. Numerical simulation study is carried out based on the flow ratio as the main variable. The results show that pure oxygen injected in the divergence section can improve the vector control effect compared to inert gas. However, its positive correlation with the flow ratio is also in advance. Injecting pure oxygen at the same time in the throat and the divergence section, the vector control effect is not as good as that in expansion section and the inert gas injection. Moreover, the injection of pure oxygen into the throat does not provide a better adjustment of the combustion chamber pressure than inert gas.