Influence of coaxial fuel-air jets on mixing performance of extruded nozzle at supersonic combustion chamber: Numerical study

Increasing the mixing efficiency of the fuel jet along the combustion chamber is a crucial step for the advancement of the current high-velocity vehicles. In this article, comprehensive computational investigations have been performed to disclose the role of an annular air jet on the fuel mixing of the single extruded nozzle located inside the combustion chamber. This study has tried to offer hydrodynamic insight about the jet flow feature when released from the extruded nozzle in supersonic cross flow. Computational fluid dynamic is used for the visualization of fuel jet interactions with air stream. Effects of nozzle height on the mechanism of fuel jets are extensively analyzed in this investigation. Our results show that the injection of the annular jet would increase the strength of the circulations, and consequently, fuel mixing improves inside the combustion chamber. Our findings display that fuel mixing increases about 100% by the injection of the annular air jet in the combustion chamber.