Wavelet Analysis of the Near-Field Structure in a Bounded Jet

摘要

In order to reveal the flow structure of a turbulent bounded jet in both Fourier and physical spaces, the wavelet cross spectrum function is firstly proposed based on the wavelet transform in this paper. Then, the wavelet transform, local wavelet Reynolds stress and wavelet Reynolds stress are used to analyze the large eddy motions and the seconsdary flow structure over a measured frequency-physical plane. The experimental fluctuating velocities at various positions in the near-field are used for the analyses.