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Article
New Composites Based on Closed-Cell Polyurethane Foam and Natural Nanomaterials
The feasibility of use of natural nanomaterials, namely, natural aluminosilicate (halloysite) nanotubes and nanocellulose, as modifying additives to commercial polyurethane foam to vary fire resistance and mec...
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Article
Open AccessFlow Structure and Transition to Local Turbulence Downstream of an Asymmetric Narrowing that Imitates Arterial Stenosis
The results of experimental studies and numerical simulation of the flow structure in the separation region downstream of an asymmetric narrowing of smooth canal that simulates 70% one-sided stenosis of the ar...
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Article
Duality of the Stream Pattern of Supersonic Viscous Gas Flow past a Blunt-Fin Junction: the Effect of a Low Sweep Angle
The results of numerical solution of the problem of supersonic flow past a symmetric blunt fin mounted on a plate along which the boundary layer is developed are given. The initial formulation of the problem i...
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Article
Supersonic Laminar Flow Past a Blunt Fin: Duality of the Numerical Solution
The results of a numerical solution of the problem of supersonic flow past a blunt fin mounted on a plate with a develo** boundary layer are presented. Generally, the case considered corresponds to the flow ...
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Article
Duality of the Vortex Structure Arising in a Supersonic Viscous Gas Flow Past a Plate and a Blunt-Fin Body Junction
The results of a numerical solution of the problem of supersonic flow past an elongate blunt-fin body mounted on a plate with develo** laminar boundary layer are presented. The calculations cover flow cases ...
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Article
Numerical Analysis of Vortex Structures and Heat Transfer in a Supersonic Flow Past the Junction of a Blunt-Fin Body and a Plate
We report on the results of numerical simulation of a supersonic laminar flow past the junction of a blunt-fin body and a plate. We analyze the gasdynamic and vortex structures of the flow, which are determine...
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Article
Comparison of RANS and IDDES solutions for turbulent flow and heat transfer past a backward-facing step
Numerical simulations were carried out under conditions of the benchmark-quality experiments of Vogel&Eaton (1985), where nominally 2D fluid dynamics and heat transfer past a backward-facing step in a channel ...
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Article
Experience Gained from Designing Exhaust Hoods of Large Steam Turbines Using Computational Fluid Dynamics Techniques
Experience gained from designing exhaust hoods for modernized versions of K-175/180-12.8 and K-330-23.5-1 steam turbines is presented. The hood flow path is optimized based on the results of analyzing equilibr...
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Article
Numerical Modeling of Steam-Gas Flow in NPP Containment with VVER and Passive Heat Removal
The main elements of a mathematical model and test results for the specialized code PGS-TK to be used for calculating the flow of a multicomponent steam–gas mixture in the containment of a power-generating uni...
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Article
Numerical investigation of three-dimensional turbulent flow and endwall heat transfer in a large-scale cascade of turbine blades
Numerical simulation is performed of three-dimensional turbulent flow and heat transfer in a cascade of turbine blades (Langston cascade), for which numerous data are available in the literature. For closing t...
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Article
Numerical simulation of flow in a steam-turbine exhaust hood: Comparison results of calculations and data from a full-scale experiment
Results of verification of the method of numerical simulation and calculation of energy loss in exhaust hoods of steam turbines are given. The usefulness of using this method as a tool for designing exhaust ho...
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Article
Assessment of the quality of reprofiling of T-100-12.8 turbine blades with the use of numerical simulation of a flow in plain turbine rows
Characteristics of blade profiles are presented that were developed in the course of modernization of the type T-100-12.8 turbine control stage by means of numerical simulation of viscous turbulent flow in pla...
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Article
Development of elements for the modernized flow path of a T-100-12.8 steam turbine by the methods of computational aerodynamics
The results of gasdynamic development of the flow path elements in modernization of the high-pressure cylinder of a T-100-12.8 turbine using reaction blading the presented. The numerical simulation of viscous ...
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Article
Numerical simulation of turbulent convection of air in a square cavity heated on the side
A set of three-dimensional unsteady-state equations is used, with the Rayleigh number of 1.58×109, to calculate the turbulent, statistically two-dimensional convection of air in a closed cavity with side walls he...
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Chapter
CFD-analysis of Secondary Flows and Pressure Losses in a NASA Transonic Turbine Cascade
Results of numerical simulation of highly three-dimensional turbulent flow and pressure losses in a transonic turbine cascade are presented. Computations have been carried out using the one-equation Spalart-Al...
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Article
Numerical Modeling of the Three‐Dimensional Unsteady Convection of a Silicon Melt in a Vessel Typical of Czochralski‐Method Apparatuses
Calculations of the quasiperiodic and stochastic regimes of three‐dimensional convection of a silicon melt (Pr = 0.015) have been performed for a rotating vessel whose complicated shape is typical of crucibles...
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Article
Modelling Analysis of Oxygen Transport During Czochralski Growth of Silicon Crystals
Global model of oxygen transport in the melt and inert gas is proposed which is based on coupled two-dimensional stationary modeling of global heat transfer, laminar flow of inert gas and turbulent flow in Si ...
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Article
Characteristics of the mechanism of coherent optical emission in relativistic undulator devices
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Article
Effect of compressibility on vortex breakdown in a gas flow in a circular tube
Vortex breakdown in a steady axisymmetric viscous gas flow within a circular tube is numerically simulated. The conditions under which reverse flow regions are formed are determined over a wide range of Mach a...
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Article
Experimental investigation of instabilities in flow through a long square channel rotating about the transverse axis
The results of an experimental investigation of bifurcation phenomena in a laminar flow through a rotating square channel approximately 50 channel widths long are presented. A comparison with known results of ...
