%0 Journal Article %A Kozlov, Victor V. %A Grek, Genrich R. %A Kozlov, G. V. %A Litvinenko, Maria V. %D 2011 %I Begell House %K round jet, streaky structures, visualization, Kelvin-Helmholtz vortices, heat-loss anemometric measurements, acoustics %N 2 %P 0 %R 10.1615/VisMechProc.v1.i2.30 %T Visualization of the processes of development and turbulent breakdown of a low speed round jet %U https://www.dl.begellhouse.com/journals/08456987543b9011,26ad62154ce5f233,318dd5e701472516.html %V 1 %X Results of experimental investigations of the influence of longitudinal streaky structures on the turbulization process of a a low speed round laminar jet are presented in this work. Qualitative characteristics of the jet development with the application of a smoke visualization of the flow pattern in the jet and video filming of cross and longitudinal sections of the jet, illuminated by a laser sheet at the image stroboscoping. It is shown that streaky structures can be generated directly in the nozzle exit section, and their interaction with the Kelvin-Helmholtz ring vortices leads to the appearance of azimuth beams (Λ- or Ω-vortex structures) of a type of a distortion of the 2D Tollmien-Schlichting wave at a nonlinear stage of classical transition in the near-wall flows. The influence of the jet outflow velocity and acoustic excitation on the jet turbulization is considered. %8 2012-02-06