Thrust augmentation by after-burning in a scramjet nozzle

A numerical study of scramjet after-burning through the injection of liquid oxygen into the nozzle is conducted. A maximum thrust augmentation of 300% is found. An understanding of the thrust augmentation phenomenon is provided in the form of a force contribution breakdown, analysis of the nozzle flowfields and finally the analysis of the surface pressure and shear stress distributions acting upon the nozzle wall.