Effect of unit Reynolds number on the laminar-turbulent transition on a swept wing in supersonic flow
- Authors: Ermolaev Y.G.1, Kosinov A.D.1,2, Semenov A.N.1,3, Semionov N.V.1, Yatskikh A.A.1,2
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Affiliations:
- Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
- Novosibirsk State University
- Sobolev Institute of Geology and Mineralogy SB RAS
- Issue: Vol 25, No 5 (2018)
- Pages: 659-665
- Section: Article
- URL: https://journals.rcsi.science/1531-8699/article/view/217870
- DOI: https://doi.org/10.1134/S0869864318050025
- ID: 217870
Cite item
Abstract
An experimental study of the influence of unit Reynolds number on the position of laminar-turbulent transition in swept-wing boundary layer at supersonic flow velocities was carried out. In the experiments, a swept-wing model with 3-% circular arc airfoil and 45-deg gliding angle of wing edges was used. The position of the transition was iden-tified using a hot-wire anemometer. It was found that at М = 2 and 2.5, an increase in the unit Reynolds number (Re1) leads to a transition delay. It was shown that an increase in freestream Mach number and in the level of flow pulsations in the wind-tunnel test section leads to a less pronounced influence of Re1 on the transition position. At a high noise level due to the growth of Mach number or due to the introduction of vortical disturbances, no effect due to unit Reyn-olds number on the transition position was observed.
About the authors
Yu. G. Ermolaev
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
Email: semion@itam.nsc.ru
Russian Federation, Novosibirsk
A. D. Kosinov
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS; Novosibirsk State University
Email: semion@itam.nsc.ru
Russian Federation, Novosibirsk; Novosibirsk
A. N. Semenov
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS; Sobolev Institute of Geology and Mineralogy SB RAS
Email: semion@itam.nsc.ru
Russian Federation, Novosibirsk; Novosibirsk
N. V. Semionov
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
Author for correspondence.
Email: semion@itam.nsc.ru
Russian Federation, Novosibirsk
A. A. Yatskikh
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS; Novosibirsk State University
Email: semion@itam.nsc.ru
Russian Federation, Novosibirsk; Novosibirsk