| Issue |
MATEC Web Conf.
Volume 412, 2025
42nd. Annual Conference “Meeting of the Departments of Fluid Mechanics and Thermomechanics” in the connection with XXIV. International Scientific Conference “The Application of Experimental and Numerical Methods in Fluid Mechanics and Energy” (42nd. MDFMT & XXIV. AENMMTE-2025)
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| Article Number | 01008 | |
| Number of page(s) | 7 | |
| Section | Measurement and Calculation of State Variables in the Fluid Flow | |
| DOI | https://doi.org/10.1051/matecconf/202541201008 | |
| Published online | 05 September 2025 | |
Effect of Single Blade Vibration on Wake Turbulence in a Linear Cascade
1 Department of Power System Engineering, Faculty of Mechanical Engineering, University of West Bohemia, Universities 8, 301 00 Pilsen, Czech Republic
2 Czech Academy of Sciences, Institute of Thermomechanics, Dolejškova 5, 182 00 Prague, Czech Republic
3 Research and Testing Institute Pilsen, Tylova 46, 301 00 Pilsen, Czech Republic
4 Vinnytsia National Agrarian University, Sonyachna 3, 21008 Vinnytsia, Ukraine
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract
The present research examines the impact of isolated blade oscillations on the turbulent flow structure in a linear blade cascade. The study was carried out at a Reynolds number of 2.3 × 10⁵ with blade vibrations induced at 73 Hz. Additionally, the experimental program includes two incident angles (-3°, +6°) and three blade motion modes: stationary, bending oscillations, and torsional oscillations. The resulting turbulence behavior was analyzed using hot-wire anemometry. The findings highlight the dominant role of incident angle and bending vibration in wake formation and turbulence dynamics. At lower blade inclinations, the bending significantly reduces wake depth and enhances large-scale vortex formation. Compared to the stationary blades, the integral length scale increases 7.5 times under bending and 2.2 times under torsional vibrations, emphasizing the bending-induced motion as a primary contributor to the formation of large energy-containing turbulent structures. Notably, Kolmogorov microscales in the wake remain nearly constant at approximately 30 μm, regardless of the experimental conditions.
© The Authors, published by EDP Sciences, 2025
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