抄録
Flow visualization using Laser Light Sheet method was carried out to observe the large scale eddies in bounded jet. In order to reveal flow structure of a turbulent bounded jet in terms of period and time delay, the wavelet cross-correlation analysis was employed to analyze cross-correlation relationships between X-components of the fluctu-ating velocities at two different points near the wall in the near field. From the distribu-tions of the wavelet cross-correlation coefficients, similar structures of eddy motions with various scales were shown and branching of eddy structures was observed. The periodic eddy motions can be easily determined in terms of period and delay time. The large scale structure in bounded jet has been confirmed, comparing the information from flow visualization with the result of analysis.
