Abstract
The article presents the results of an experimental study of the cavitation flow around the NACA 0012 series foil in a slit channel with a width of 1.2 mm. The aspect ratio of the streamlined body was 0.02. To identify the main features of the two-phase flow, high-speed visualization was performed using the Photron FASTCAM NOVA S12 camera with a sampling frequency of 20 kHz. The internal structure of cavities was detected. The main frequencies of cavities formation in the flow were determined using digital processing of visualization data. The close location of the channel walls was shown to significantly affect the return flow propagation under the cavity and its separation.
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The work was carried out with financial support of the grant from the Russian Science Foundation (Project No. 19-79-10217).
The authors suggest that the obtained visualization data will give a new impetus to the study of cavitation flows and will serve to find the cause of the unsteady behavior of vapor-gas cavities.
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Tsoy, M.A., Skripkin, S.G., Naumov, I.V. et al. High-speed visualization of cavities, arising in a slit channel of complex shape. Thermophys. Aeromech. 29, 959–964 (2022). https://doi.org/10.1134/S0869864322060166
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DOI: https://doi.org/10.1134/S0869864322060166