The present study focuses on the formation of cavitation in cold and hot water and in cryogenic fluid, characterized by strong variations in fluid properties caused by a change in temperature. Cavitation phenomenon is investigated in water and nitrogen flows in a convergent-divergent nozzle through pressure measurements and the optical visualization method. High-speed photographic recordings have been made, the cavitation phenomena evolution and the related frequency content are investigated by means of pixel intensity time series data. The results obtained concur with those obtained with the spectral analysis of the pressure signals. In the case of cryogenic fluid frequency peaks are shifted towards lower frequencies, with respect to cold water and the magnitude of the signal rises, in particular at low frequencies, for nitrogen and hot water. This can be due to thermal effects that contribute also to the low frequencies in the case of cryogenic fluid. To verify the validity of this assumption, a simple model based on the resolution of Rayleigh equation is used.
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ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis
July 12–14, 2010
Istanbul, Turkey
Conference Sponsors:
- International
ISBN:
978-0-7918-4917-0
PROCEEDINGS PAPER
Thermodynamic Effects on Cavitation in Water and Cryogenic Fluids
Maria Grazia De Giorgi,
Maria Grazia De Giorgi
University of Salento, Lecce, Italy
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Maria Giovanna Rodio,
Maria Giovanna Rodio
University of Salento, Lecce, Italy
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Antonio Ficarella
Antonio Ficarella
University of Salento, Lecce, Italy
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Maria Grazia De Giorgi
University of Salento, Lecce, Italy
Maria Giovanna Rodio
University of Salento, Lecce, Italy
Antonio Ficarella
University of Salento, Lecce, Italy
Paper No:
ESDA2010-24694, pp. 475-482; 8 pages
Published Online:
December 28, 2010
Citation
De Giorgi, MG, Rodio, MG, & Ficarella, A. "Thermodynamic Effects on Cavitation in Water and Cryogenic Fluids." Proceedings of the ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, Volume 3. Istanbul, Turkey. July 12–14, 2010. pp. 475-482. ASME. https://doi.org/10.1115/ESDA2010-24694
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