Numerical and experimental research on unsteady cavitating flow around NACA 2412 hydrofoil

Sedlář, Milan; Komárek, Martin; Rudolf, Pavel; Kozák, Jiří; Huzlik, Rostislav

doi:10.1088/1757-899x/72/2/022014

Cited by 8 publications

(1 citation statement)

References 6 publications

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“…The presence of interfacial interphase leads to a reflection of the light and therefore increases brightness of the region affected by the cavitation. Comparison of the HS video analysis with pressure fluctuations can be found in [8], where cavitation over NACA profile was investigated or in [4] where analysis of C-D nozzle was presented. While in case of the initial phases of cavitation (e.g.…”

Section: Fft Analysis Of the Pixel Intensity Fluctuationsmentioning

confidence: 99%

Transition of cavitating flow to supercavitation within Venturi nozzle – hysteresis investigation

et al. 2017

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Abstract. Cavitation is usually considered as undesirable phenomena. On the other hand, it can be utilized in many applications. One of the technical applications is using cavitation in water treatment, where hydrodynamic cavitation seems to be effective way how to reduce cyanobacteria within large bulks of water. The main scope of this paper is investigation of the cavitation within Venturi nozzle during the transition from fully developed cavitation to supercavitation regime and vice versa. Dynamics of cavitation was investigated using experimental data of pressure pulsations and analysis of high speed videos, where FFT of the pixel intensity and Proper Orthogonal Decomposition (POD) of the records were done to identify dominant frequencies connected with the presence of cavitation. The methodology of the high speed (HS) records semiautomated analysis using the FFT was described. Obtained results were correlated and above that the possible presence of hysteresis was discussed.

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Section: Fft Analysis Of the Pixel Intensity Fluctuationsmentioning

confidence: 99%