Distinctive features of turbulent flows in round channels with the Reynolds number decreasing along the length

摘要

The distributions of the Reynolds number, the velocity profiles, and the turbulence parameters along the length of channels are obtained by numerical simulation of turbulent flows in a diffuser and a tube with gas suction through permeable walls. The comparison between the calculated results for the diffuser and the tube with gas suction makes it possible to establish the main features of fairly complicated flow restructuring processes.