Abstract
In order to reveal the unsteady structure of secondary flow of a turbulent bounded jet in both frequency and physical spaces, the wavelet cross spectrum was used to analyze the experimental velocity signals at two different positions near the wall in the near field. From the wavelet cross spectrum between two different fluctuating velocity components, the instantaneous contribution to Reynolds stress and the mechanism of eddy motion and secondary flow may be easily analyzed. The wavelet cross spectrum analysis of the velocity components at two different locations may determine the frequency and the location of the large-scale structure and the secondary flows in the shear layer near the wall.
