TESTING OF CONSTRUCTION MATERIALS FOR CAVITATION RESISTANCE

Authors

DOI:

https://doi.org/10.18372/0370-2197.2(103).18668

Keywords:

cavitation, cavitation erosion, cavern collapse, cavitation pressure fluctuations, throttle device, fatigue life

Abstract

The article presents the results of experimental studies of the cavitation erosion of structural materials widely used in aviation hydraulic drives. The effect of the air saturation of the working fluid on the intensity of the cavitation erosion of structural materials was determined. It is proposed to use as a cavitation generator a throttle device functioning in the mode of developed cavitation when investigating the cavitation resistance of structural materials. The effectiveness of throttle cavitation generators was evaluated based on their flow-difference characteristics. The design of the cavitation chamber for testing structural materials for cavitation resistance is presented. A mechanism of cavitation erosion is proposed, in which the mechanical influence of shock waves and microjets on the surface of the test sample dominates. The incubation period of structural materials that are widely used in hydraulic engineering and their cavitation resistance are determined. The rate of cavitation erosion caused by the supply pressure on the cavitation generator was studied. It was determined that the cavitation erosion of plastic materials occurs almost linearly, while for solid materials the nonlinear dependence is observed. It is proposed to increase the fatigue life of structural materials, which are widely used in aircraft construction, by cavitation treatment of their surface within the incubation period of the cavitation.

Author Biographies

 Taras Tarasenko, National Aviation University

 Сandidate of Technical Sciences, Associate Professor of the Department of Hydrogas Systems of the National Aviation University, 1 Lubomyra Huzar Ave., Kyiv, Ukraine, 03058, phone/fax: +38 044 408 45 54

Valery Badakh, National Aviation University

Сandidate of Technical Sciences, Senior Researcher, Head of the Department of Hydrogas Systems of the National Aviation University, 1 Lubomyra Huzar Ave., Kyiv, Ukraine, 03058, phone/fax: +38 044 408 45 54

Mykola Makarenko, National Aviation University

 Candidate of Technical Sciences, Associate Professor of the Department of Computer Technologies, Design and Graphics of the National Aviation University, Lyubomyr Huzar Avenue, 1, Kyiv, Ukraine, 03058, +38(050)0504727

Ihor Dubkovetsky, National University of Food Technologies

Candidate of Technical Sciences, Associate Professor of the Department of Processes and Apparatus of Food Production of the National University of Food Technologies, Volodymyrska Street, 68, Kyiv, Ukraine, 01601, +39(098)7191396

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Published

2024-06-25

Issue

No. 2(103) (2024)

Section

Проблеми тертя та зношування