Effects of synthetic jet disturbances on the movement of the shear layer

The main application of this study is the discussion of the shear flow movement of a SJA (synthetic jet actuator acting) on the BFS flow. Reynolds number Re-h = 1.18 x 10(4), the range of measurement x / h = 0.05-12, y / h = 0.2 similar to 1.5. The velocity of the flow field was measured by hot wire anemometers, and uses the phase average method to discuss the eddy current structure of the flow field. In this study, the signal generator is used as a reference signal to the synthetic jet device, and the average of each phase in the calculation is more than 50. The results show that the phase averaging method can observe the periodic change of the flow field, and the obvious periodic change can be seen from the results of the axial velocity. If the velocity gradient is used to define the position of the shear layer, the synthetic jet device can produce a strong shock of the flow and the effective field limits the flow recirculation zone in the x / h <2.5h, the purpose of controlling the flow field.