Open AccessThe effect of intermittency on the transition to turbulence in the jets
Author(s) -
В. В. Леманов,
Vladimir V. Lukashov,
К. А. Шаров
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1359/1/012008
Subject(s) - intermittency , turbulence , jet (fluid) , laminar flow , mechanics , physics , reynolds number , outflow , transverse plane , transition point , meteorology , structural engineering , engineering
For the outflow of jets of various gases from long round tubes, the mode of transition to turbulence through the intermittency mechanism in the near field of the jet was experimentally detected for the first time. This mode is realized in the range of Reynolds numbers of 1900-3200, when inside the jet source, a laminar-turbulent transition occurs in the tube. The reasons of intermittency are turbulent spots (puff). These localized turbulent structures are formed inside the pipe, have a length of about 10-30 pipe diameters in the jet and occupy the entire transverse size of the jet flow.