Voskoboinick V. Space-time characteristics of coherent structures, velocity and pressure fields into the dimpled vortex generators

The mechanisms of formation and evolution of the coherent vortex structures inside boundary layers on streamlined bodies and in separation flow over cavities, which generate pseudosound fluctuations, have been comprehensively studied in the work. Physic simulations of vortex flow have carried out into the dimpled vortex generators on the streamlined hydraulically smooth flat hard and erosion surfaces. Integral, space-time correlation and wave-number frequency spectral characteristics of vortex flow and pseudosound wall-pressure fluctuations were analyzed in detail. The nonlinear mechanism of interaction is detected between vortical structures and streamlined surface for the different regimes of flow.