TY  - CONF
AU  - Shao, Xiao
AU  - Ayan, Hilmi Oguzhan
AU  - Hübenthal, Fabian
AU  - Rüttgers, Mario
AU  - Lintermann, Andreas
AU  - Schröder, Wolfgang
TI  - Investigating the Effects of Spanwise Transversal Traveling Waves on a Turbulent Compressible Flat Plate Flow With the Aid of a Deep Autoencoder Network
VL  - 69
CY  - Jülich
PB  - Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
M1  - FZJ-2025-02462
T2  - Schriften des Forschungszentrums Jülich IAS Series
SP  - 89-93
PY  - 2025
AB  - The impact of spanwise traveling transversal surface waves on drag reduction in turbulent compressible flat plate flow is explored. The findings indicate that when the traveling phase speed approaches the freestream velocity at 𝑀 = 0.7, a shock wave is induced in the spanwise direction. This shock wave effectively breaks down streamwise vortices into smaller scales, which significantly enhances drag reduction. The spanwise shock wave is a large-scale quasi-periodic phenomenon. To understand its impact on the multi-scale nature of turbulent flows, a nonlinear mode decomposing deep convolutional autoencoder is employed. The results show that the autoencoder reconstructs the flow field more accurately compared to Proper Orthogonal Decomposition (POD) and Dynamic Mode Decomposition(DMD). Additionally, it effectively separates the large-scale spanwise shock wave and small-scale turbulent structures, which achieves a clearer distinction than POD and DMD.
T2  - 35th Parallel CFD International Conference 2024
CY  - 2 Sep 2024 - 4 Sep 2024, Bonn (Germany)
Y2  - 2 Sep 2024 - 4 Sep 2024
M2  - Bonn, Germany
LB  - PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
DO  - DOI:10.34734/FZJ-2025-02462
UR  - https://juser.fz-juelich.de/record/1041830
ER  -