Stability of time-periodic flow with laminar boundary-layer separation
- Authors: Boiko A.V.1,2, Dovgal A.V.1, Sorokin A.M.1
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Affiliations:
- Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
- Tyumen State University
- Issue: Vol 25, No 5 (2018)
- Pages: 667-673
- Section: Article
- URL: https://journals.rcsi.science/1531-8699/article/view/217877
- DOI: https://doi.org/10.1134/S0869864318050037
- ID: 217877
Cite item
Abstract
The influence of the low-frequency modulation of flow behind a rectangular backward-facing step on the amplitude characteristics of disturbances in the separated laminar boundary layer has been studied. The experimental data were obtained by the method of hot-wire anemometry in a wind tunnel at a low subsonic velocity. Response of the separated flow to the long-wave oscillations generated by a local source of disturbances on the surface of the experimental model was clarified. The low-frequency nonstationarity of the separation region leads to a growth of velocity fluctuations in the separated boundary layer, which dominate the laminar-turbulent transition and the state of the flow in the near-wall region.
About the authors
A. V. Boiko
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS; Tyumen State University
Author for correspondence.
Email: boiko@itam.nsc.ru
Russian Federation, Novosibirsk; Tyumen
A. V. Dovgal
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
Email: boiko@itam.nsc.ru
Russian Federation, Novosibirsk
A. M. Sorokin
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
Email: boiko@itam.nsc.ru
Russian Federation, Novosibirsk