Frequency spectra of turbulent pulsations and the stability of a laminar boundary layer

The mechanism governing the formation of a quasi-ordered turbulent structure in a confined flow of a viscous fluid is examined. It is suggested that the formation and growth of turbulent vortices are associated with the existence of a quasi-stationary pulsation field that is caused by the propagation of long-range waves and their reflection from the wall. The interaction between a vortex and the field is of a resonant nature, and the zone of quasi-ordered motion coincides with the resonance region. The limits of the frequency range of the turbulent pulsations are determined using the model proposed here.