合成射流激励器控制喷管矢量研究

利用试验方法研究合成射流激励器对喷管气流矢量控制的作用效果,证明在恰当条件下喷管气流矢量角可改变30°.试验结果证实,喷管射流角度的改变不但与激励器工作参数和喷管流动速度、流量相关,同时还与激励器工作时产生的向下游迁移的"涡对"对周围流体"卷吸"形成的低压卷吸场有关,并与卷吸涡对与主流自由剪切层之间的耦合作用有着密切联系,以上可以认为是喷管矢量受控的机理.

Investigation of nozzle vector control using synthetic jet actuator

Novel fluidic actuators based on synthetic jet technology were used to experimentally investigate the effectiveness on the flow vector control.In the proper conditions,the primary jet's vector could change at angles exceeding 30 degrees.It is proved that the alteration of flow vector angle is correlated with not only the actuator parameter,the flow velocity and flow rate,but also with the downstream wrap sucking field with low pressure,which is formed by the action of "vortex pair" during the actuator operating.It is also closely correlated with the coupling effect between the vortex pair and the free shearing layer.This is treated as the mechanism of vector control.