Effect of Swirl Injectors Spacing and Injection Pressure on Interacting Sprays

Abstract

Mass flux distribution is generally regarded as one of the most critical parameters of a rocket combustion chamber. Because the mass flux distribution depends mainly on the interference effect of the spray, examining the interference phenomena is of vital importance to develop a rocket. Yegorychev established a numerical model that predicts the mass distribution of fuel and oxidant flux. Notwithstanding his groundbreaking achievement, Yegorychev neither clarified the constraint range of his numerical model nor visualized the jet. In order to fill the gaps in the Yegorychev `s study, we focused on defining the constraint range and visualizing the interference phenomena using high time-resolution laser diagnostics. In this study, we obtained vivid and high time-resolution images revealing the mechanism of interference phenomena. Also, we have shown that 30H is constraint range of Lefebvre`s numerical model. Our laser diagnostics images and advanced model can be used to analyze the combustion instability problems in a rocket combustor.