Study on Dynamic Internal Flow Field Performance of Shock Vector Controlled Vectoring Exhaust Nozzle

At the base of a 2D convergent-divergent nozzle,the 2D unsteady Reynolds average N-S equation and RNG k turbulence model was used to study the unsteady flow field of fluidic thrust vectoring nozzle based shock control.The flow field and thrust characteristic were investigated when the total pressure of secondary flow was continually changed.With the increase of secondary pressure,the shock caused by the interaction of main flow and secondary flow would be enhanced,and the shock moved toward the up stream of nozzle.There would be reversed flow areas when the pressure increased to certain value,moreover,the area extended with the pressure.When the secondary flow pressure increased,the axial thrust of nozzle increased continually,while the thrust ratio decreased.At the same time,the side thrust firstly climbed up,and then declined.