On Interaction of T S Waves and ۳ D Localized Disturbance in a Divergent Flow Under Zero Pressure Gradient

To simulate the effect of free st ream turbulence on turbulent spot formation, experiments were conducted on the interaction of localized three-dimensional disturbances with the harmonic waves in a laminar boundary layer on a flat plate. Experiments conducted in three-dimensional diverging flow (but zero pressure gradient) show, while individually the disturbances decay downstream, their interaction leads to amplification of three-dimensional disturbance leading to formation of the turbulent spot. Also flow divergence show the least effect in the interaction process.

کلیدواژه ها:

T ، S Waves ، ۳ ، D Flow ، Turbulence Spot ، Transitional Boundary Layer