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Fluid Dynamics
Erschienen in: Fluid Dynamics 6/2023

19.12.2023

Effect of the Skin Made of Micro Floating Raft Arrays on Weakly Nonlinear Stability in Boundary Layer Flow

verfasst von: S. Tang, S. G. Liu, D. Zhao, L. Q. Dong, L. Chen, J. Cui

Erschienen in: Fluid Dynamics | Ausgabe 6/2023

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Abstract

The skin made of micro floating raft arrays is a novel method in drag reduction engineering, the study of nonlinear boundary layer stability of flow over the skin is necessary. The weakly nonlinear stability theory is applied to flow over the skin. The weakly nonlinear stability problem of flow over the skin is solved for the first time. The weakly nonlinear flow stability characteristics of skin are analyzed. The results show that increase in the stiffness and damping ratios intensifies the distorted velocity of the Tollmien–Schlichting waves (TSW) but decrease the distorted velocity of travelling-wave flutter (TWF). Reducing the interval and the middle mass of the micro floating raft element can lead to a similar influence on the distorted velocity. The nonlinearity does not change the objective law of the effect of skin’s parameters on stability in the boundary layer. The skin can effectively improve the weakly nonlinear stability of the Tollmien–Schlichting waves: the skin with appropriate parameters lightens the velocity distortedness and reduces the perturbation nonlinear growth rate. The better control ability of skin on nonlinear flow stability also proves the potential in drag reduction.
Vorheriger Artikel Hall Current Induced MHD Convection of a Nanofluid Subjected to the Heat and Salt Diffusion

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Metadaten
Titel
Effect of the Skin Made of Micro Floating Raft Arrays on Weakly Nonlinear Stability in Boundary Layer Flow
verfasst von
S. Tang
S. G. Liu
D. Zhao
L. Q. Dong
L. Chen
J. Cui
Publikationsdatum
19.12.2023
Verlag
Pleiades Publishing
Erschienen in
Fluid Dynamics / Ausgabe 6/2023
Print ISSN: 0015-4628
Elektronische ISSN: 1573-8507
DOI
https://doi.org/10.1134/S0015462823600797

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