Characteristics of the circular subsonic laminar jets flow with an initial Poiseuille profile

Abstract In this work, the experimental data are compared with version of “strong” jet (Re ≫ 1) exact Landau-Squire solution. The experiments were performed for a submerged air flowing out tube diameter D = 3.2 mm and length more than 100 at Reynolds number equal to Re 436. initial conditions in Poiseuille velocity profile, level pulsations is less 1%. Measurements carried using hot-wire anemometer. It shown that satisfactory agreement theory achieved distances from starting x/D 5.6 up zone transition turbulence ( > 35). Turbulence along axis will increase 1% 2.5%, while mixing layers it increases 4.7%.