The velocity time sequence at different vertical locations of turbulent boundary layer in wind tunnel was finely measured using a hot-wire anemometer

at a resolution higher than the corresponding minimum turbulence time scale.As compared with normal temperature

the heat convection could accelerate the exchanges of momentum

mass and energy in wall turbulence

and also facilitate the development process of turbulent boundary layer.Wavelet analysis method was employed to study the effects of temperature boundary layer on phase-averaged waveforms of multi-scale coherent structures during ejection and sweep process in wall turbulence.The research reveals that heat convection enhances dramatically the strength of coherent structures

contributing much to the exchange of momentum

mass and energy in wall turbulence.