Abstract
The experimental results of the jet flow issuing from the circular pipe with the pliable fluttering fins have been discussed in this paper. In order to investigate the effects of these fins on the jet diffusion, the flow visualization by the LIF and the image processing by the PIV method have been carried out. As a result, it has been found that the jet width becomes large in the case of the jet issuing from the pipe with the fluttering fin. Moreover, the wavelet multi-resolution analysis has been also conducted, by using the image obtained from the flow visualization. As a result, it has been clarified that the fluttering fin affects the flow structure largely.
