抄録
Some types of switching phenomena observed in a wall-reattachment fluidic amplifier are systematically described from the view-point of the unstabilization of reattachment. First, two factors for causing the unstable reattachment defined here are pointed out and experimentally confirmed. These are: (a) pulling out a jet from one side to the low-pressured opposite side, and (b) separating the reattached flow by the pressure non-decreasing along the downstream from the reattachment point. Then, our interesting “switching” can be understood as a phenomenon that the reattachment is sequencially unstabilized by the these two different reasons.
Adopting the above view-point, we can directly investigate the reasonableness of existing theories, and revise them for the better. Further, in formulating the so-called splitter switching which has not been investigated in detail, this view-point may produce many important suggessions because we can grasp the jet behaviors in more detail.
