Evolution of vectoring control of a primary jet with synthetic jets

The technique of jet vectoring using synthetic jets has a potential ability of thrust vectoring a primary jet,such as thrust vectoring controlling the inlet air jet and the nozzle jet of the air-breathing engine.To investigate the evolution of vectoring control of a primary jet with synthetic jets,a primary jet vectoring control using synthetic jet actuators with different exit configurations was numerically simulated and analyzed.The results show the evolution of jet vectoring using synthetic jets is divided into three stages.In the conduit of the primary jet,the low-pressure region,which results from the interaction between the synthetic jet and the primary jet,contributes to the vectoring force and leads to a turning of the primary jet at the conduit exit,and the primary jet turns I.And then,in the near field,the primary jet fluid is entrained and absorbed by the synthetic jet during the blowing and the suction stroke,and the primary jet turns Ⅱ.Finally,in the far field,the shear layer of primary jet is inspirited by the vortices of synthetic jet,and the primary jet turns Ⅲ.So the final vectoring angle of the primary jet is a overall result of the primary jet controlled by synthetic jet at the three stages,=Ⅰ+Ⅱ+Ⅲ.