Issue №: 1(116)
The journal deals with the problems of vibration technologies and machines, mathematical methods of vibration process studies, information on design and technological development, presents teaching and methodological aspects of teaching in the Higher School of Applied Sciences, where vibration machines and technologies are studied.
WEAR IN HYDRODYNAMIC DEVICES OF THE VENTURI TUBE TYPE
Vitenko Dmytro – PhD student at the Department of Food Technology Equipment, Ternopil Ivan Puluj National Technical University (56 Ruska St., Ternopil, 46001, Ukraine).
Hydrodynamic static-type devices are widely used in various industries, including chemical, food, pharmaceutical, and water treatment technologies. Their efficiency is based on effects related to the life cycle of vapor-gas bubbles formed under specific hydrodynamic conditions within the system. At the same time, a significant issue with such devices is the destruction of working surfaces due to cavitation erosion, which is accompanied by material loss, reduced strength, and structural changes in the material. The impact of the cavitation regime, which arises under a certain ratio of pressure and velocity, can lead to the formation of microcracks that develop into more severe damage over time.
This article has investigated certain aspects influencing cavitation wear on the walls of models with conical and screw-shaped obstacles. It has been established that the wear intensity depends on flow parameters such as inlet pressure and liquid velocity. Based on numerical modeling results, the region of vapor-gas phase formation has been identified and confirmed through experimental studies on pressure variations along the apparatus and visual observations. Additionally, the highest acceleration values on the apparatus walls have been recorded within the outlet diffuser section, where vapor-gas bubbles collapse and directly impact the walls. A comparison of the two hydrodynamic device models has shown that the use of a conical obstacle promotes a more uniform distribution of the vapor-gas phase along the diffuser, potentially reducing the intensity of local wear. It has been determined that when the inlet pressure increases from 0.4 MPa to 0.6 MPa, the hydrodynamic regime stabilizes, and the vapor-gas phase shifts toward the flow centre, which reduces its negative impact on the walls. However, the increase in mass loss of the sample due to intensified cavitation suggests a greater impact on the technological medium. The obtained results will contribute to the development of effective methods for reducing wear and enhancing the durability and efficiency of the equipment.
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About the journal
The journal "Vibrations in Engineering and Technologies" is included in the list of technical scientific publications of Ukraine
(Category "B", Order of the Ministry of Education and Science of Ukraine dated July 2, 2020 No. 886)
Old version of the site: http://vibrojournal.vsau.edu.ua/
The journal "Vibrations in Engineering and Technology" is indexed by the following databases and catalogs:
The certificateof massmedia State registration:kv no 16643-5115 from 30.04.2010 .
Founder of the journal: Vinnytsia National Agrarian University
The journal is devoted to highlighting current issues in engineering, mechanical engineering, and technological processes, including the study of dynamic and oscillatory phenomena in technical systems, the application of mathematical methods for process modeling and analysis, as well as the presentation of results of design-engineering and technological developments. Particular attention is given to the study of vibration processes and their application in modern technologies.
The purpose of the scientific journal “Vibrations in Engineering and Technologies” is to disseminate the results of fundamental and applied research in the field of engineering sciences aimed at developing theoretical foundations and practical approaches to the design, analysis, and improvement of machines, materials, and technological processes, including the use of vibration and oscillatory effects in various sectors of production.
The publication is focused on the formation of a modern scientific and informational environment for the effective exchange of research results, support of innovative development, and implementation of advanced technical solutions in industry, agro-industrial production, and related fields.
The journal promotes the development of interdisciplinary research, the integration of modern engineering approaches, and the enhancement of the efficiency of technological processes and technical systems, including through the rational use of vibration phenomena.
Objectives of the Scientific Journal
To achieve its stated purpose, the journal addresses the following key objectives:
dissemination of results of fundamental and applied scientific research in the fields of mechanics, mechanical engineering, technological processes, machine dynamics, and equipment, as well as in areas related to the application of vibration phenomena in engineering and technologies;
promotion of research aimed at the creation and improvement of machines, mechanisms, and technological equipment based on oscillatory and vibration processes;
support for the implementation of modern technological solutions focused on improving productivity, energy efficiency, and reliability of technical systems;
обеспечение scientific exchange of research results among research institutions, higher education establishments, and industrial enterprises;
development of interdisciplinary cooperation among researchers in the fields of mechanics, materials science, material processing technologies, and automation of technological processes;
dissemination of modern scientific achievements and advanced technologies related to the application of vibration processes in production and technical systems.
Publisher Vinnytsia National Agrarian University
In June 1994 the 2nd International Scientific and Technical Conference "Application of vibrations for technological purposes" was organized on the basis of Vinnytsia State Agricultural Institute. Leading experts in this field, noting the significant contribution to the school of Vibration Engineering under the leadership of P. S. Bernyk, proposed to create a professional all-Ukrainian scientific and technical journal "Vibration in engineering and technology..The journal was foundedat Vinnytsia State Agricultural Institute and P.S. Bernyk was elected to be the chief editor .
For all these years (since 1994) theJournal "vibration in engineering and technology" published 119 issues wherestudy of vibration effects, the creation of progressive energy saving technologies and equipment for their implementation were highlighted.
Currently Ihor Kupchuk, Candidate of Technical Sciences, Associate professor, Associate Professor of the Department of Engineering Mechanics and Technological Processes in the Agricultural Industry Faculty of Engineering and Technology Vinnytsia National Agrarian University is the chief editor of the "Vibrations in engineering and Technology"
The journal "Vibration in Engineering and technology", which has no analogues on the territory of Ukraine, is well known abroad.
