Contents
HEAT-AND-POWER ENGINEERING FUNDAMENTALS
SOME THEORETICAL PROBLEMS IN CHEMICAL ENGINEERING
Chr. Bojadjiev
e-mail: chboyadj@bas.bg
Bulgarian Academy of Sciences, Institute of Chemical Engineering
Keywords: column modeling, diffusion model, velocity nonuniformity, scale-up, scale effect, average concentration models, parameter identification.
Abstract
The chemical engineering is a branch of the chemical science with object of investigations the physical chemistry processes in the industrial apparatuses in the chemical plants. It use modeling and simulation as fundamental methods for investigation of the chemical engineering processes on the bases of the fundamental achievements of the chemistry, physics and mathematics. The main purpose of these investigations is quantitative description of the mechanism and kinetics of the industrial apparatuses for its optimal design, control or renovation.
INTENSIFICATION OF KONVECTIVE HEAT EXCHANGE AT LAMINARNOM FLOW OF FUEL OIL OF THE M-100 BRAND AND 0,65 % The Na-KMT SOLUTION IN TEPLOOBMENNIKE WITH ELLIPTIC COULISSES ON WALL Of CHANNEL
Ananev D.V., Vachagina E.K.
e-mail: Dima211083@yandex.ru
Research center fоr Power Engineering Problems Kazan Scientific Center Russian Academy of Sciences
Keywords: Heat exchange, fuel oil of the M-100 brand, 0,65% Na-KMT solution, discrete-rough channels, heat and hydrodynamics efficiency, laminar flow.
Abstract
In the work the heat exchange is explored at the flow of fuel oil of the M-100 brand and 0,65% Na-KMT solution in the discrete-rough channels. A geometrical region of flow is a semiendless cylindrical channel with the periodically located ledges, as an ellipse, on the inlying surface of channel. The given geometrical region was designed in the applied program Femlab package. For description of reological properties of liquid the Kutateladze – Habahpasheva model was used. The search of decisions is made with the use of numeral methods. During the numeral computations the heat exchange at different geometrical sizes of elliptic coulisses was explored, and those variants which heat and hydrodynamics efficiency would have been at maximal were determined.
METHOD FOR SURFACE FRICTION ESTIMATION IN TURBULENT SEPARATED FLOW
N.I.Mikheev, V.M.Molochnikov, I.A.Davletshin
e-mail: n.miheev@mail.ru
Research Center of Power Engineering Problems Kazan Scientific Center of RAS
Keywords: skin friction, vector, modulus, flow separation, turbulence.
Abstract
Method for surface friction modulus estimation in complex turbulent flows is submitted in this paper. Time averaged surface friction modulus is defined only on basis of an average value and fluctuations intensity of its longitudinal component. Comparative analysis has been performed covering the obtained evaluations and measurements of vector magnitude with two-component sensor in various separated flows.
POWER GENERATION STATIONS
LIKELIHOOD ESTIMATION OF SAFETY OF THE ATOMIC POWER STATION DEPENDING ON RELIABILITY AND OPERATING MODE GTU AS THE ADDITIONAL SOURCE OF RESERVATION OF OWN NEEDS OF THE ATOMIC POWER STATION
Aminov R.Z., Shkret A.F., Garievskiy M.V., Novichkov S.V., Jankov A.V.
e-mail: novichkov@sstu.ru
Keywords: reliability, safety, atomic power station
Abstract
Results of an estimation of influence of indicators of reliability and operating modes GTU as an additional reserve source of own needs of the atomic power station on safety of functioning of station are resulted.
TO THE QUESTION OF DECREASE IN QUANTITY OF FORMED ADJOURNMENT IN SYSTEMS TES – THE CLOSED THERMAL NETWORK
Chichirova N.D., Chichirov A.A., Ljapin A.I., Ginijatullin B.A.
e-mail: pinpin3@mail.ru
Kazan state power engineering university
Keywords: a thermal power plant, network water, подпиточная and turnaround water
Abstract
The technique of definition of material streams of system a thermal power plant – the closed heating system is developed. Results of calculation of material balance of system the Zainsky state district power station – the closed thermal network are presented. Volumes присосов tap water in system, leaks of network water are quantitatively defined. The estimation of speed of formation of adjournment, their qualitative structure and a site is spent. Recommendations about the rational organisation of the chemical control and about modernisation of the scheme of preparation подпиточной waters and processings of water of a thermal network are developed.
POWER AND MECHANICAL ENGINEERING
STRAIN OF THE DISK OF THE STEAM TURBINE DEPENDING
Toporov D.V.
e-mail: denistop5@mail.ru
Keywords: elastic-plastic deformations, cycles with variable amplitude, behaviour of a material
Abstract
In the present work it is considered elastic-plastic deformations of model of the sample depending. Verification of nonlinear model of hardening of Kabosha for cycles with constant amplitude is spent at a dissymetric cycle and for cycles with variable amplitude. It is defined that at constant amplitude takes place unilateral accumulation of plastic deformations with their subsequent attenuation. In cycles to variable amplitude at an overload there is a sharp increase in plastic deformations, and all subsequent cycles settle down in a curve of deformation of a cycle of an overload. The comparative estimation of behaviour of a material is presented at cyclic the smooth cylindrical sample in the conditions of soft
MODE MIXITY AND CONSTRAINT PARAMETERS ACCOUNTING FOR CRACK TIP CURVATURE
V.N.Shlyannikov, S.Yu.Kislova
e-mail: svetlana_kislova@mail.ru
Research Center for Power Engineering Problems of the Russian Academy of Sciences
Keywords: mixity and constraint parameters, crack growth angle, finite element analysis, small scale yielding, second order stress field, elastic-plastic behavior of the material, radial and angular stress distributions.
Abstract
The results of calculations for both elastic-plastic mixity and constraint parameters in full range of mode I and mode II combinations accounting for crack-tip curvature are presented. Full-field finite element analysis based on a modified boundary layer approach is employed to model the mode mixity effects on elastic-plastic crack tip behavior. The present work is based on the assumption that the tangential stresses have to have extremum along the crack growth direction. The elastic-plastic mode mixity parameter has been found accounting for the crack tip curvature. To determine the constraint parameter an additive decomposition is used for the actual full-field stress at the crack tip into a reference field and second order stress field. It is found that the constraint factor under mixed mode loading is strongly dependent upon the crack tip curvature. The relations between a constraint factor of the second-order stress field and mode mixity parameter for different crack tip curvature values are determined.
THE ANALYSIS OF THE IS INTENSE-DEFORMED CONDITION OF THE DISK OF THE STEAM TURBINE WITH OPERATIONAL DAMAGES
Yarullin R.R.
e-mail: yarullin_r@mail.ru
Keywords: mounted disks, a crack, a flat tension, flat deformation, factor of intensity of pressure.
Abstract
The is intense-deformed condition (VAT) of a disk of steam turbine VT-50 is investigated under operational conditions and the basic are defined disk zones. Settlement schemes axial a groove with defects are constructed and series of calculations for various variants of geometry of cracks and conditions a disk are spent.
ECONOMICS, ECOLOGY, INNOVATIVE TECHNOLOGIES AND PROCESSES IN POWER ENGINEERING
COMPOSITION CONCEPT MATERIAL MATTER HOW THE PROCESS excited by the impact of the charge
A.V. Pinchuk, V.A. Pinchuk
Abstract:
Under the assumption of going beyond conventional physical basis stated and substantiated by further research ideas about the nature of the anomalous (cold) mutations chemical and isotopic composition of material media as a phenomenon of relaxation character. The results confirm, including the validity of the actual physical positions, originally used as a basis for specifying the basic tasks and methods.