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163 results on '"Nikulin N"'

8. Investigation of interstage channel of hybrid turbomolecular pump.

Author

Shostak, J. A., Nikulin, N. K., Shostak, P. A., Tsakadze, G. T., and Svichkar, E. V.

Subjects
*TEST methods, *PROBABILITY theory, *GEOMETRY, *MOLECULES
Abstract

The calculation is implemented using a statistical approach, and it is based on the application of the test particle method (Monte Carlo). Probability of direct and reverse transition of gas molecules through the channel between turbomolecular and molecular drag stages of pump is determined. The effect of movable walls limiting the channel is taken into account. As a result of the research, the effect of geometric and dynamic parameters of the inter-stage channel on the vacuum characteristics of the interstage channel was determined. Dependencies of probability of gas molecules passing through interstage channel on relative indices determining geometry and dynamics of channel walls are given. [ABSTRACT FROM AUTHOR]

Published
2021
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27. Analysis of profiles of screw vacuum pumps

Author

Malov, D. A., primary, Svichkar, E. V., additional, Klyucharov, V. S., additional, Nikulin, N. K., additional, Shemarova, O. A., additional, Nesterov, S. B., additional, and Avtonomova, I. V., additional

Published
2020
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40. Molecular-Viscous Vacuum Pump (MVVP).

Author

Svichkar, E. V., Nikulin, N. K., Klyucharov, V. S., and Demikhov, K. E.

Subjects
*VACUUM pumps, *MOLECULAR dynamics, *GAS flow, *MOLECULAR structure, *HELICAL gears, *MATHEMATICAL models
Abstract

In this study, the principle of operation of the new type of vacuum pumps - molecular-viscous vacuum pump (MVVP), that provides vacuum system evacuation in a wide pressure range, - is described. Despite such a wide range of operation of the pump, the main area of it's application is the molecular-viscous regime of gas flow, also called the transition regime of gas flow. Comparison of the developed vacuum pump with two-rotor pumps and vortex pump with the same geometric parameters allows one to conclude the qualitative operating of the pump and the higher evacuating parameters in the studied pressure range. [ABSTRACT FROM AUTHOR]

Published
2017
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