Vectored Thrust Jet Numerical Simulation Studies

Thrust vectoring dramatically increases the agility, maneuverability, and survivability of fighters and missiles. On the aspect of aerodynamics and mechanics researchers performed many investigations to achieve thrust vectoring, and achieved significant progress. Mechanical thrust vectoring with axisymmetric nozzle and 2D nozzle were applied on the 4th generation fighters, and the one with movable flaps were used on newly producted missile; fluidic thrust vectoring were improved rapidly and became closer to application.Thrust vectoring flow interferes the flow over aircrafts, and drives its aerodynamic load to vary; Thrust vectoring flow also varies the flow near tail which are close to the nozzle, and may potentially influence the controllability of aircrafts. Few scientific publication has concerned these inflences and variations by now. Therefore in this study the influence on the flow over aircrafts acted by thrust vectoring was discussed. The computational simulation using Euler equations with multi-block grid and finite volume method was conducted. Force coefficients were compared among a series of jet flow conditions. The effects of thrust vectoring on flow over aircrafts , the trend of aerodynamic load variation, together with the influence on tail were analyzed.