On the Jet Vector Deflection based on Active Flow Control Technique

This paper presents a new method and consideration of jet vector deflection based on active flow technique.The idea that to change jet flow from insensitive and difficult to control into sensitive and easy to control was implemented by using side wall.Specifically,oblique expending solid wall plates are mounted on both sides of primary jet nozzle to reduce the fluid pressure between jet and solid boundary,the jet vector is realized.Then,the primary jet proportional deflection is controlled by the home-made beveled synthetic jet actuators flush mounted on solid wall.Test results show that maximum jet deflection angle has reached 15° and the primary jet proportional deflection has achieved.In addition,the different actuator position angle,the excitation frequency,the effect of working parameters of excitation voltage on excitation effect were studied as well.In the case of momentum ratio between synthetic jet and primary jet flow is 1∶43,the primary jet deflection angle may achieve 13°,but synthetic jet actuators consume energy power is only 1.5W.Thus,the high efficient controlling of jet deflection realized with small energy consumption.