%0 Journal Article %A Kozlov, Victor V. %A Katasonov, Mikhail M. %A Sboev, Dmitry Sergeevich %D 2012 %I Begell House %K laminar-turbulent transition, high free-stream turbulence, forerunners, longitudinal structures %N 4 %P 0 %R 10.1615/VisMechProc.2013003838 %T EXPERIMENTAL STUDY OF LOCALIZED BOUNDARY LAYER DISTURBANCES AT HIGH FREE-STREAM TURBULENCE LEVEL %U https://www.dl.begellhouse.com/journals/08456987543b9011,6c2dbf4525681f51,7d9847857e1aa9e0.html %V 2 %X Turbulence production processes in boundary layer at enhanced and high level of free-stream turbulence have been studied. The longitudinal localized disturbances developing in the boundary layer under the action of free-stream turbulence were artificially modeled using a blowing-suction technique. Wave packets, or forerunners, produced in the boundary layer, in the region preceding the abrupt local change of flow velocity near the localized-disturbance fronts, were examined. The enhanced and high level of free-stream turbulence was found to accelerate the downstream evolution of the wave packets and their transformation into turbulent spots. %8 2013-04-01