A TURBULENT PLANE 2-DIMENSIONAL WALL-JET IN A QUIESCENT SURROUNDING

An experimental investigation of the turbulence field in a plane two-d imensional wall-jet has been conducted. All measurements were carried out employing hot-wire techniques in a large scale experimental facili ty. Mean velocities, Reynolds stresses and wall shear stress were dete rmined with slot Reynolds numbers of 1.0 x 10(4), 1.5 x 10(4) and 2.0 x 10(4). The wall-jet was found to be self-preserving, and an asymptot ic scale matching was used to show the existence of a short inertial s ublayer as compared with a wall boundary layer. Studies of the integra l scale development and the turbulent diffusion of shear stress showed a strong interaction between the inner and outer regions of the wall- jet. Using momentum scaling, it was found that the streamwise developm ent of the half-width and maximum mean velocity was independent of the slot Reynolds number.