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TsAGI Science Journal

ISSN Imprimir: 1948-2590
ISSN En Línea: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2013010513
pages 465-490

INFLUENCE OF A SURFACE FRACTAL MICROSTRUCTURE ON THE CHARACTERISTICS OF A TURBULENT BOUNDARY LAYER

Murad Abramovich Brutyan
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky Str., Zhukovsky 140180, Russia
Vyacheslav Petrovich Budaev
National Research Centre, Kurchatov Institute
Andrey Viktorovich Wolkov
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky Str., Zhukovsky, Moscow Region, 140180, Russian Federation
Anatoliy Mikhaylovich Zhitlukhin
Troitsk Institute for Innovation & Fusion Research (State Research Center of Russian Federation)
Aleksey Vladislavovich Karpov
Troitsk Institute for Innovation & Fusion Research (State Research Center of Russian Federation)
Nikolay Sergeevich Klimov
Troitsk Institute for Innovation & Fusion Research (State Research Center of Russian Federation)
Igor Stanislavovich Menshov
Keldysh Institute of Applied Mathematics of the Russian Academy of Sciences, 4, Miusskaya Square, Moscow 125047, Russia
Vyacheslav Leonidovich Podkovyrov
Troitsk Institute for Innovation & Fusion Research (State Research Center of Russian Federation)
Andrey Yuryevich Urusov
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky Str., Zhukovsky, Moscow Region, 140180, Russian Federation
Aleksandr Aleksandrovich Uspenskii
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky str. 1, Zhukovsky, Moscow Region, 140180 Russia
Maxim Vladimirovich Ustinov
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky str. 1, Zhukovsky, 140180, Russia

SINOPSIS

The results of startup experimental investigations on the properties of a turbulent boundary layer over flat plates with a chaotic micro- and nanostructure possessing hierarchy of granularity (fractality) are given. Experimental investigations were carried out in the low-turbulent and low-speed aerodynamic T-36I wind tunnel at TsAGI. The samples in the experimental study were flat plates (160 × 160 mm2) with a fractal surface, which were obtained by high-temperature plasma processing in the fusion device, QSPA-T, of metallic plates that were originally smooth. The influence of the surface fractal microstructure on the velocity spectrum and the structure of the turbulent boundary layer were registered in both load and hot-wire experiments. Suppression of the low-frequency bandwidth of the velocity spectrum and the change in aerodynamic drag were observed, which indicates the possibility of turbulence control.