Abstract
As a part of study on the diffusion control and the direction one the diffusion of the jet flow issuing from the pentagonal duct with and without the synthetic jet actuator was studied by using the hot wire anemometer. As a result, it has been found that the width of the jet with synthetic jet becomes large, comparing with that of the normal pentagonal jet. Moreover, to investigate the coherent structure of the jet flow, the continuous wavelet transform was conducted using the information of the fluctuating velocity. As a result, it has been found that there exists the difference of the flow structure between the pentagonal jets with and without synthetic jet.
