RESEARCH OF CAVITATION EROSION OF STRUCTURAL MATERIALS
DOI:
https://doi.org/10.18372/0370-2197.4(101).18081Keywords:
cavitation, cavitation erosion, cavern collapse, cavitation pressure fluctuations, throttle deviceAbstract
The results of experimental studies of the patterns of wearing of structural materials which are used in the hydraulic machine design engineering under the impact of hydrodynamic cavitation are presented. It is proposed to use a throttle device working in the mode of developed cavitation and being the throttle generator of cavitation pressure fluctuations, as a cavitation generator in studies of the cavitation resistance of structural materials. The rational type of throttling device for creating the liquid’s cavitation flow has been established based on the analysis of flow and differential characteristics of throttling devices of various schemes, which work as throttle cavitation generators of pressure fluctuations. It is proposed to use the dimensionless pressure drop on the throttle cavitation generator of pressure fluctuations as a cavitation criterion. The peculiarities of generation of the cavitation pressure oscillations by a throttle generator have been studied. The regularity of the influence of the pressure drop on the throttle cavitation generator of pressure fluctuations (mode of operation) on the range of cavitation pressure fluctuations and the amount of cavitation wear has been established. The influence of the geometric parameters of the throttle cavitation generator of pressure fluctuations on the intensity of the cavitation erosion was determined. Analytical dependences of the rate of cavitation erosion of test samples of materials on the pressure at the inlet to the throttle cavitation generator of pressure fluctuations were determined.
The results of the experimental research can be used to create highly efficient throttle cavitation generators of pressure fluctuations for the study of the cavitation erosion, cleaning the parts from contamination, intensification of technological processes in the chemical, oil production and other industries. On the other hand, the obtained results make it possible to create the hydraulic units that will have the high resistance to the cavitation erosion.
References
Tarasenko T.V. Kavitatsiine vytikannia ridyny cherez droselnyi prystrii / T.V. Tarasenko, V.M. Badakh - Mechanics and Advanced Technologies 3 (81), 2017. – S. 82 – 91.
Oba, R. and Miyakura, X. (1987),“Stochastic behavior (randonness) of acoustic pressure pulsses in the near subcavitating range”,Intern. Journal, pp. 581 – 586, DOI: https://doi.org/10.1299/jsme1987.30.581.
Themistoklis M. Cavitation erosion risk assessment for a marine propeller behind a Ro–Ro container vessel / M. Themistoklis, S. Soren, Tom J.C. van Terwisga // Physics of Fluids. Vol. 35, Issue 1, January 2023, 013342.
Joshi S. Sph modelling of a cavitation bubble collapse near an elasto-visco-plastic material / S. Joshi, J. P. Franc, G. Ghigliotti, M. Fivel,.// Journal of the Mechanics and Physics of Solids. Vol. 125, April 2019. p, 420–439.
Magnotti M. Development and validation of the cavitation-induced erosion risk assessment tool / M. Magnotti, M. Battistoni, K. Saha, S. Som ///Transportation Engineering. Vol. 2, December 2020. 100034.
Hlazkov M.M. Kavytatsyia v zhydkostnыkh systemakh vozdushnыkh sudov / M.M. Hlazkov, V.H. Lanetskyi, N.H. Makarenko y dr. KYYHA, Kyev, 1987. – 61 s.
Tarasenko T.V. Doslidzhennia lokalizatsii i intensyfikatsii kavitatsiinoi erozii pry vysokonapirnomu droseliuvanni ridyny v hidravlichnykh prystroiakh / T.V. Tarasenko, V.M. Badakh – Problemy tertia ta znoshuvannia. №2 (83) – 2019. S. 93 – 103.
Pylypenko V.V. Kavytatsyonnыe kolebanyia / V.V. Pylypenko – Kyiv, Naukova dumka, 1989. – 316 s.
Hlazkov M.M. Matematychna model rozmakhu kavitatsiinykh pulsatsii tysku / M.M. Hlazkov, V.H. Lanetskyi, T.V. Tarasenko – Materialy IKh mizhnarodnoi naukovo-tekhnichnoi konferentsii «Avia - 2007» Tom.2. NAU, Kyiv. – S. 60 – 62.
Tarasenko, T.V.,Badach, O.,Puzik, K. (2013),Krayushkina Functional units based on cavitation effects for hydraulic systems of vehicles,Science – Future of Lithuania: 16th Conference for Junior Researchers, May 8, 2013, Vilnius, Lithuania, pp. 50-54.
