Determining the mechanism for generating cavitation pressure fluctuations in throttle devices at high-head throttling of liquid

Authors

DOI:

https://doi.org/10.15587/1729-4061.2024.309656

Keywords:

cavitation flow, pressure pulsations, pressure drop, discrete jet, high-head throttling

Abstract

The object of this study is the process of generating cavitation pressure fluctuations behind the throttle device at high-head throttling of liquid. This paper addressed the problem of calculating the amplitude of cavitation pressure fluctuations at high-pressure liquid throttling. It was established that cavitation pressure fluctuations are a consequence of collisions of discrete masses of a transiting liquid jet in the region of pressure recovery. The range of cavitation pressure fluctuations reaches the pressure values at the inlet to the throttle device. The frequency band of cavitation pressure fluctuations is in the range from 1.5 to 20 kHz and higher. At high-head throttling of the liquid, caverns attached to the surface of the throttle channel, moving caverns and small bubbles in the transit flow are formed. Moving caverns compress the transit flow and divide it into separate fluid blocks. In the region of pressure restoration, the moving caverns are slammed shut and discrete fluid blocks collide. This causes high-frequency pressure fluctuations. Special feature of the results is the possibility of estimating the range of cavitation pressure fluctuations depending on the pressure drop on the throttle device. When the back pressure on the throttle device increases, the amplitude of cavitation pressure fluctuations decreases, and the frequency band shifts to the high-frequency region. The results make it possible to calculate the range of cavitation oscillations, to predict the development of cavitation erosion of materials depending on the parameters of throttling of the working fluid. The results of the work are used to design devices for cleaning products from contamination, for determining the volume content of water in aviation fuel, for intensification of technological processes in the chemical and food industries.

Author Biographies

Taras Tarasenko, National Aviation University

PhD

Department of Hydro-Gas Systems

Valerii Badakh, National Aviation University

PhD

Department of Hydro-Gas Systems

Mykola Makarenko, National Aviation University

PhD

Department of Computer Technologies for Design and Graphics

Pavel Lukianov, National Aviation University

PhD

Department of Hydro-Gas Systems

Igor Dubkovetskiy, National University of Food Technologies

PhD

Department of Processes and Apparatus of Food Production

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Determining the mechanism for generating cavitation pressure fluctuations in throttle devices at high-head throttling of liquid

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Published

2024-08-29

How to Cite

Tarasenko, T., Badakh, V., Makarenko, M., Lukianov, P., & Dubkovetskiy, I. (2024). Determining the mechanism for generating cavitation pressure fluctuations in throttle devices at high-head throttling of liquid. Eastern-European Journal of Enterprise Technologies, 4(7 (130), 21–31. https://doi.org/10.15587/1729-4061.2024.309656

Issue

Vol. 4 No. 7 (130) (2024): Applied mechanics

Section

Applied mechanics

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Copyright (c) 2024 Taras Tarasenko, Valerii Badakh, Mykola Makarenko, Pavel Lukianov, Igor Dubkovetskiy

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