D L Karelin

Naberezhnye Chelny State Pedagogical Institute

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i-10 index

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A V Boldyrev

Naberezhnye Chelny State Pedagogical Institute

АМ

А М Белоусов

Kamskij State Institute of Physical Culture

S. V. Boldyrev

Kazan Federal University

V L Mulyukin

Kazan Federal University

R. M. Khisamutdinov

Kazan Federal University

Aleksei V. Boldyrev

Kazan Federal University

V. M. Gureev

Kazan State Technical University named after A. N. Tupolev

V V Zvezdin

Kazan Federal University

V L Muljukin

Naberezhnye Chelny State Pedagogical Institute

Sergei V. Boldyrev

Kazan Federal University

Cooperative Institutions

Kazan Federal University

Naberezhnye Chelny State Pedagogical Institute

Kazan State Technical University named after A. N. Tupolev

Russian Academy of Sciences

Nuclear Safety Institute

Kamskij State Institute of Physical Culture

Omsk State Technical University

State Optical Institute named after SI Vavilov

Moscow State Technological University

Academy of Sciences Republic of Uzbekistan

Author Statistics

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Research of the Hydrostatic Transmission Static Characteristics in Case of Curvilinear Moving of the Mobile Machine

D L Karelin A V Boldyrev А М Белоусов S. I. Kharchuk

The article considers the vehicle hydrostatic transmission containing a volumetric axial flow divider. The displacements of sections of the flow divider are varied by adjusting the swash plates angles. Thus, the flow divider provides independent control of the angular velocity of each unadjustable hydraulic motor. The method of calculating the swash plate slope angle of each section of the flow divider in dependence on the turning radius of the vehicle is presented. The static characteristics of the hydrostatic transmission of the vehicle under the conditions of motion along a curvilinear trajectory were obtained.

Swash

Hydrostatic equilibrium

10.1109/gfps.2018.8472317

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Modeling and Dynamic Analysis of Adjustable Axial Flow Divider

Lecture notes in mechanical engineering (2018)

D L Karelin A V Boldyrev А М Белоусов

Current divider

Hydrostatic equilibrium

Section (typography)

10.1007/978-3-319-95630-5_64

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Math modeling and transient characteristics research of vapor compression cooling system

AIP conference proceedings (2019)

D L Karelin A V Boldyrev S. V. Boldyrev

The article describes the problem of maintaining the energy efficiency of modern heat transformers in off-design operating conditions. A structural scheme of the vapor compression cooling system and static mathematical model based on the equations of heat balance and heat transfer and modified in terms of additional accounting for the effect of outside air mass flow on heat transfer in a heat exchanger-condenser are presented. A control method is proposed which combines a simultaneous change in the compressor capacity and the mass flow rate of the working medium by controlling the expansion valve while maintaining the pressure ratio.

Transient (computer programming)

Vapor-compression refrigeration

Transient analysis

10.1063/1.5122148

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The method of comparative analysis of the effectiveness of vapor-liquid compression cooling system and conventional liquid cooling system by relative energy indicators

Journal of Physics Conference Series (2020)

D L Karelin A V Boldyrev V. M. Gureev S. V. Boldyrev S I Kharchyk

Abstract The article presents a new method for the comparative analysis of the effectiveness of a vapor-liquid compression cooling system and traditional solutions based on single-phase liquid and air cooling, while taking into account the combination of cooling capacity factors, the power expended on this, depending on the ambient temperature. As a result of numerical simulation, it was proved that the total power consumption CS ∑ N c s ′ for ensuring the operability of the vapor-liquid compression cooling system with increasing ambient temperature decreases relative to the similar total power consumption ∑ N CS for a system using traditional cooling methods. With increasing mass flow rate and temperature of the cooling air, the relative power consumption ∑ N C O ′ / ∑ N C O for the functioning of the cooling systems under consideration becomes less than the relative energy indicator of the quantities of heat removed Q И / Q CO from the cooled object.

10.1088/1742-6596/1683/2/022071

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A mathematical model of the controlled axial flow divider for mobile machines

IOP Conference Series Materials Science and Engineering (2016)

V L Mulyukin D L Karelin А М Белоусов

The authors give a mathematical model of the axial adjustable flow divider allowing one to define the parameters of the feed pump and the hydraulic motor-wheels in the multi-circuit hydrostatic transmission of mobile machines, as well as for example built features that allows to clearly evaluate the mutual influence of the values of pressure and flow on all input and output circuits of the system.

10.1088/1757-899x/134/1/012039

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Modeling of dynamics of vapor compression cooling system

IOP Conference Series Materials Science and Engineering (2018)

D L Karelin A V Boldyrev S. V. Boldyrev А М Белоусов

A mathematical model of cooling system with a vapor-liquid compression unit is presented. The modeling of dynamics of the parameters of the vapor compression system during the system start-up in the cooling mode was carried out. It is noted that with the accepted assumptions the evaporation and condensation temperatures stabilize fast enough: in the evaporator - in 0.5 s, in the condenser - in 2 s.

Vapor-compression refrigeration

Condenser (optics)

10.1088/1757-899x/412/1/012032

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Research of parameters of hydrostatic transmission with axial flow divider for cases of multi-drive vehicle maneuvering

IOP Conference Series Materials Science and Engineering (2020)

А М Белоусов D L Karelin A V Boldyrev S. V. Boldyrev

Abstract The article considers a mathematical model of hydrostatic transmission with an axial flow divider for a multi-drive vehicle during its maneuvering. The new method for controlling the energy parameters of the wheel drive by adjusting the angles of swash plates for each section of the axial flow divider depending on the radius of rotation of the multi-drive vehicle is presented and static characteristics are constructed.

Swash

Hydrostatic equilibrium

Axial Compressor

10.1088/1757-899x/915/1/012007

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Design Features of Multistage Centrifugal Compressor of Vapor Refrigerating Machine with Complete Working Fluid Intercooling

Procedia Engineering (2017)

D L Karelin A V Boldyrev А М Белоусов

The work sets out the distinctive features of the method of gas-dynamic calculation of multistage centrifugal compressors for refrigerating machines running on a cycle of multi-stage compression of working fluid with its complete intercooling between the stages. The parameters of width of specific sections of the impellers, diffusers, and reverse guide vanes as well as the operating parameters during polytropic compression and parameters of the inner power of the compressor were corrected. The research outcomes can be used in the design of centrifugal compressors for refrigerating machines operating at the specified cycle.

Centrifugal compressor

Working fluid

Vapor-compression refrigeration

Diffuser (optics)

10.1016/j.proeng.2017.10.666

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Numerical simulation of boiling temperature dynamics in two-phase refrigerant flow in horizontal pipes

Journal of Physics Conference Series (2019)

D L Karelin A V Boldyrev S. V. Boldyrev А М Белоусов

The transient dynamic characteristics of shell-and-tube multi-pass heat exchanger-evaporator of vapor compression cooling system are studied. Based on the balance of thermal power and the criterial heat transfer equations the mathematical model of the physical processes taking place in the heat exchanger-evaporator is compiled. The change in the coefficient of heat transfer due to a change in the two-phase regime of the working refrigerant flow is taken into account, as well as the change in time of the mass and vapor content of the working refrigerant in the evaporator over time. The change in time of the mass flow of the working refrigerant at the start of the cooling system from the standby mode is determined using the specified function of changing shaft speed of the compressor in time. The simplifying assumptions accepted for compilation of the mathematical model are listed. The differential equation of evaporation temperature dynamics is solved by the fourth-order Runge-Kutta method with a fixed step. The change in evaporation temperature in time at two values of the ambient temperature is studied. The existence of abrupt drop zone of evaporation temperature on the transient characteristics within 0.1 seconds after the system start from standby is revealed and explained.

Thermal expansion valve

Condenser (optics)

Vapor-compression refrigeration

Transient (computer programming)

10.1088/1742-6596/1158/3/032005

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The laser heat-treatment process control by the non-stationary convective heat exchange modeling

IOP Conference Series Materials Science and Engineering (2020)

V V Zvezdin R R Saubanov R. R. Rakhimov R. M. Khisamutdinov A V Boldyrev

Various technological processes allow to obtain high quality indicators, such as laser cutting, welding, hardening, etc. The article presents the results of modeling for laser cutting of thick-walled structures. The creation of computational tools for express analysis in a mathematical setting and a quantitative assessment of temperature fields in spatially variable and non-stationary conditions of laser exposure are of undoubted practical interest to minimize experimental costs.

Hardening (computing)

Case hardening

10.1088/1757-899x/915/1/012059

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