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Supersonic flow is a concept that has been researched heavily for the past twenty years. It has many applications, with the most notable one being for the defense industry. This project specifically is based off a model that is being currently used for Air Force research. With supersonic flow, where the Mach number is larger than one, there has been continual research specifically on flameholders. Flameholders involve the discussion of the mixing, ignition, and combustion of the fuel that is released into the lower cavity of the scramjet. There is a current standard for the placement of fuel jets, but very little data as to why this is the best choice. The objective of this research is to prove that the current placement of the fuel jet is optimal and to use computational fluid dynamics software to visualize the fuel/air mixing of various nozzle placements. Five nozzles were created and ran in Star-CCM+ and conclusions were drawn by use of the passive scalar function. As final conclusions were made it was determined that the current fuel jet placement is optimal and similarities between it and other referenced findings was noted. Even though this project was constrained by time, there is an ending discussion on how this project could be continued for further research.

Publication Date



South Dakota State University


Aerospace Engineering | Mechanical Engineering | Propulsion and Power

CFD Simulation of Varying Fuel Jet Placement of Mach 2 Flow (Paper)



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