Journal of Theoretical
and Applied Mechanics

47, 1, pp. 3-16, Warsaw 2009

Experimental analysis of velocity field structure in isothermal countercurrent jets

Barbara Wojciechowska, Piotr Domagała, Stanisław Drobniak
The paper presents results of experimental analysis of the flowfield in isothermal countercurrent round jets. The velocity measurements were carried out by means of a hot-wire anemometry. The instantaneous signals collected during the experiment were digitally processed and used to determine the statistics of velocity fields and distributions of turbulence scales. The results revealed that the fluid aspiration at the jet periphery significantly influences the mixing and entrainment in the free flow.
Keywords: countercurrent jets; turbulence intensity; turbulence scales