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Biography
Dr. Serhii Shevchenko is a distinguished Ukrainian engineer and researcher specializing in mechanical engineering, particularly in the areas of centrifugal machine sealing systems and vibration reliability. He currently serves as a Senior Researcher at the G.E. Pukhov Institute for Modelling in Energy Engineering, part of the National Academy of Sciences of Ukraine, located in Kyiv
Born in 1961, Dr. Shevchenko graduated from the Kharkiv Polytechnic Institute (KhPI) in 1984 with a degree in Hydraulic Machines and Automation. He began his professional career at the Sumy branch of KhPI, where he worked from 1984 to 1994 in the research laboratory of machines’ vibration reliability. During this period, he contributed to the development of technology for aircraft and nuclear power plant (NPP) pumps
In 1990, Dr. Shevchenko defended his Ph.D. thesis on the development and research of new designs of stuffing-box seals for NPP pumping equipment. His expertise in sealing systems and rotor dynamics led to significant advancements in the reliability and efficiency of centrifugal machines
Since joining the G.E. Pukhov Institute in July 2020, Dr. Shevchenko has focused on developing science-based methodologies for creating 3D models and simulators for training operational personnel at NPPs. His research has resulted in over 40 scientific publications, including five monographs, which are utilized in training centers at Zaporozhe NPP, South Ukraine NPP, and Odessa Polytechnic State University.
In June 2023, Dr. Shevchenko was awarded a Doctor of Engineering degree for his thesis on "Mathematical Models of Processes in Sealing Systems of Centrifugal Machines," further solidifying his status as a leading expert in his field.
Research Interest
Dr. Serhii Shevchenko’s research interests focus primarily on energy engineering, mechanical systems, and reliability analysis of centrifugal machines. His work revolves around developing advanced sealing systems for centrifugal machines, with a particular emphasis on improving the efficiency and reliability of pumps in nuclear power plants (NPPs). Dr. Shevchenko's research also includes the development of vibration reliability models and methods for preventing mechanical failures in high-stress environments, such as NPPs and aerospace applications.
He is deeply engaged in the creation of 3D models and simulation tools for training operational personnel at nuclear facilities. His recent work involves mathematical modeling of sealing processes in centrifugal machines, contributing significantly to the field of rotor dynamics and mechanical engineering. His efforts aim to enhance operational safety, reduce maintenance costs, and ensure the long-term performance of vital mechanical systems in energy production and industrial applications.
Open Access Policy refers to a set of principles and guidelines aimed at providing unrestricted access to scholarly research and literature. It promotes the free availability and unrestricted use of research outputs, enabling researchers, students, and the general public to access, read, download, and distribute scholarly articles without financial or legal barriers. In this response, I will provide you with an overview of the history and latest resolutions related to Open Access Policy.
The operating experience of mechanical seals shows that as a result of angular deformations of the rings, the wear of the contact surfaces along the radius is uneven. When designing mechanical seals, it is necessary to calculate the amount of expected leakage through the seal, friction power consumption, as well as the possible durability of the unit. These calculated dependencies and estimates are obtained based on the constructed mechanical seal model. In the area of hydrodynamic load support in the case of a confusor joint or a converging fi...lm, the slope of the pressure diagram is such that a decrease in the film thickness increases the hydrodynamic support. This is referred to as enabling stable non-contact sealing operation. The execution of the rubbing surfaces of the interface of the end pair should ensure the formation of the calculated confusor shape of the sealing gap in all modes of operation and axisymmetric pressure fields during the rotation of the rotor.
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