Three-dimensional unsteady numerical investigations of startup process of fluidic control vector nozzle were performed. The objective of this study was to gain the fluid field evolvement characteristic and response time of performance parameter. By analyzing fluid field and pressure distribution on up-wall at different time

the evolution of jet interaction wave systems and vortex

which were located at near field of injection exit

was presented. The flow structures were in accordance with pressure distribution. Through time response curves

mass and thrust coefficient showed drastically fluctuations while vector angle one varied almost monotonically. The response time of them was of milliseconds magnitude.