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Theoretical and Computational Fluid Dynamics

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28-12-2023 | Original Article

Stability of supersonic boundary layer over an unswept wing with a parabolic airfoil

Authors: P. V. Chuvakhov, I. M. Ilyukhin, A. V. Fedorov

Published in: Theoretical and Computational Fluid Dynamics | Issue 1/2024

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Abstract

Under the low-noise Mach 3 flight conditions for a supersonic passenger aircraft having unswept wings with a thin parabolic airfoil, laminar-turbulent transition is due to amplification of the first mode. Stability of a local self-similar boundary layer over such a wing is investigated both using the \(e^{N}\) method in the framework of linear stability theory and direct numerical simulation (DNS). It is found that the instability amplitude should reach a maximum over the entire spectral range above the profiles of 2.5% and thicker. The locus of maximum appears at the trailing edge and moves to the leading edge as the profile becomes thicker, while the maximum amplitude decreases. The theoretical findings are supported by DNS of the linear wave packets propagating in the boundary layer. Significance of these results to the design of laminar supersonic wings is discussed.

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next article An adjoint-based methodology for calculating manufacturing tolerances for natural laminar flow airfoils susceptible to smooth surface waviness

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Title: Stability of supersonic boundary layer over an unswept wing with a parabolic airfoil
Authors: P. V. Chuvakhov
I. M. Ilyukhin
A. V. Fedorov
Publication date: 28-12-2023
Publisher: Springer Berlin Heidelberg
Published in: Theoretical and Computational Fluid Dynamics / Issue 1/2024
Print ISSN: 0935-4964
Electronic ISSN: 1432-2250
DOI: https://doi.org/10.1007/s00162-023-00680-z

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