Transformation of wing boundary layer in the filament wake


Results of an experimental study of the air flow past a straight-wing model in a low-turbulence wind tunnel are reported. The influence of a turbulent wake due to a thin filament on the structure of boundary layer on the model surface was examined. Flow visualization in boundary layer, hot-wire measurements of flow velocity, and also measurements of the amplitude and frequency spectra of flow pulsations, were performed. The wake substantially modified the boundary layer flow pattern: the separation bubble disappeared from the flow, and the formation of longitudinal structures was observed.

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Corresponding author

Correspondence to M. V. Mikhaelis.

Additional information

This work was financially supported by the Russian Foundation for Basic Research (Grant No. 13-08-00395) and by the Russian-Federation Presidential Foundation for the federal support of leading scientific schools (Grant NSh-2924.2014.1).

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Mikhaelis, M.V., Zanin, B.Y. & Katasonov, M.M. Transformation of wing boundary layer in the filament wake. Thermophys. Aeromech. 21, 693–700 (2014).

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Key words

  • turbulent wake
  • flow past model wing
  • longitudinal structures
  • boundary-layer separation
  • laminar-turbulent transition