NEAR-WALL TURBULENCE WITH STRONG INJECTIONS UNDER DIFFERENT CONDITIONS.

The flow characteristics near a wall with strong injections under different gas dynamic and thermophysical conditions are analyzed. Experimental data are presented that were obtained by various independent precision methods in air and water flows. Data on the wall concentration of the injected medium, temperature and velocity distributions, heat fluxes, velocity pulsations and their spectra, intermittency coefficient, etc. clearly show blowoff of the turbulent boundary layer from a wall at finite injection rates of relatively small values, not only on a smooth surface when it is streamlined by a gradientless low-turbulence flow, but also on a rough surface in a highly turbulent flow in the presence of a longitudinal gradient.