This paper represents results of experimental study on the coaxial flow mixing in channels with a swirled periphery jet. These experiments were carried out in the long cylindrical tubes and in the vortex chambers with a diaphragmed exit. The main attention was paid to the parameter distribution in the near-axial region of the flow depending on the entrance geometry and flow rate characteristics. The effects of the swirl angle of the periphery jet, a thickness of the edge between coaxial flows, and the concurrency parameter m = rho(s)w(s)/rho(0)w(0) on the flow stabilization within the field of centrifugal mass forces were analyzed. A character of stabilizing effect of the flows on the mixing processes was determined by a gas temperature change along the channel＇s axis and turbulence intensity. Generalizing dependencies were obtained for a relative temperature at the axis both in the swirled and direct flows. Experimental results on the heat flow mixing in vortex chambers are shown here. There are some similarities for transfer processes in the vortex chambers and long tubes. The main difference is that the diaphragmed chamber and boundary layers at the edge walls considerably effect the mixing.