Non-contact method for analysis of cavitating flows

Biluš, Ignacijo (avtor), Bizjan, Benjamin (avtor), Lešnik, Luka (avtor), Širok, Brane (avtor), Pečnik, Boštjan (avtor), Dular, Matevž (avtor)

This paper presents a novel non-contact method for simultaneous analysis of pressure and velocity conditions in cavitating flows. The method (implemented in our software ADMflow) is based on high-speed camera flow visualization and was evaluated in an experiment with ultrasonically induced acoustic cavitation of different intensities. Attached cavitation with clearly visible cavitation structures occurred on the tip of an ultrasonic probe immersed in distilled water. Using the high-speed imaging data, pressure fluctuations were calculated by a computer-aided algorithm based on the Brennen’s theory of cavitation cloud kinematics and a modified version of the Rayleigh-Plesset equation. Reference measurements of pressure pulsations were conducted by a hydrophone installed at the bottom of the liquid container. The analysis of cavitation structure dynamics was complemented by calculation of velocity fields from the imaging data, the algorithm for which is based on the advectiondiffusion equation. Calculated pressure fluctuations were analyzed in the spatial, temporal and spectral domain. Presented results indicate a strong correlation between the fields of velocity and pressure fluctuations during the growth and collapse of cavitation structures. A comparison of time series and power spectra demonstrates that our cavitation analysis method is in a reasonably good agreement with results of the reference measurement methods and can therefore be used for non-contact analysis of pressure and velocity conditions in cavitating flows.

• Jezik: Angleški jezik
• Ključne besede: acoustic cavitation, sonotrode, pressure measurement, hydrophone, computer-aided visualization, image velocimetry
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Recenzirani rokopis
• Datum sprejetja članka: 14.03.2017
• Leto izida: 2017
• Št. strani: Str. 178-186
• Številčenje: Vol. 81
• PID: 20.500.12556/RUL-126835
• UDK: 532.528
• ISSN pri članku: 0041-624X
• DOI: 10.1016/j.ultras.2017.03.011
• COBISS.SI-ID: 20392982
• Datum objave v RUL: 06.05.2021

Gradivo je del revije

• Naslov: Ultrasonics
• Skrajšan naslov: Ultrasonics
• Založnik: Butterworth Scientific
• ISSN: 0041-624X
• COBISS.SI-ID: 26569728

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.
• Začetek licenciranja: 01.11.2017

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: akustična kavitacija, merjenje tlaka, hidrofoni, računalniška podprta vizualizacija, velocimetrija slike