Implementation of new-generation steam turbines К-540-23.5 and К-600-23.5 which projects are executed using design solutions and accumulated experience of turbine operation for replacement of turbines K-500-240 which have worked off their service life at thermal power plants.

Keywords:

Shvetsov V.L., Kozheshkurt I.I., Drozdov R.A. 540…600 mw new-generation turbines for units of thermal power plants supplied by ojsc «turboatom» for replacement of turbines к-500-240-2 having worked off their service life. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 6-15.

The modification of numerical method for computations of 3D viscous compressible flows through compressors is suggested. Realisability constraints for turbulent Reynolds stresses and modification of exit boundary conditions is implemented in the new CFD solver. It enables numerical simulation of compressor flows at both operating and stall branches of performance curve with equal ease. Numerical results are presented.

Keywords:

Ershov S.V., Kozyrec D.A. Development of calculation method of three-dimensional separated flow in the flow part of the compressor. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 16-23.

The numerical experiment to change the blade profile in height of the channel for nonattack entry of the flow when working in stage was made. The plot of dependence of the integrated profile losses on the angle of inflow in blade grid was built. The assessment of prediction of the numerical data was done.

Keywords:

Boiko A.V., Burlaka M.V., Maksyuta D.I. Numerical calculation of the impact of the shock on working the blade when working in degrees. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 24-28.

The numerical analysis results of partial admission effect on unsteady loads and aeroelastic behaviour for blade rows in two stage axial compressor compartment in 3D ideal gas flow have been presented. There shown that the averaged values of blade sections deformation for rotor 1 and rotor 2 are practically the same as in case with uniform gas flow at the entrance, but the relative values of oscillation amplitudes have been increased for the blades of rotor 1 forty as large, for the blades of rotor 2 – twice or thrice as large in comparison with case under uniform gas flow at the entrance.

Keywords:

Gnesin V.I., Kolodyazhnaya L.V., Zhandkovski R. Unsteady forces and the elastic vibrations of the blades of the axial compressor at partial supply. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 29-38.

The feature of steam turbine maneuvering characteristics increasing by using variable axial and centrifugal stages with rotary distributor blades on the example of first and second stages at high-pressure cylinder of К-325-23,5 steam turbine is investigated. It is shown, it is possible to get all turbine operating modes by changing first stage distributor blades alignment angle without partial admission of steam and with greater gas-dynamic efficiency.

Keywords:

Rusanov A.V., Kosyanova A.I. The assessment of the feasibility of turning vanes guide vanes the degrees of axial and radial-axial types CVP to control the mode of operation of the steam turbine K-325-23,5. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 39-48.

The investigation of axial gap influence and supply steam sequence in regulatory stage active arcs on it efficiency in partial work mode is presented. The results of studies performed using CFD-modeling and other software systems.

Keywords:

Boiko A.V., Govoruschenko Yu.N., Usaty A.P., Avdieieva E.P. Evaluation of the influence of the gap between logs on the effectiveness of the control stage on AC mode. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 49-53.

Results of an experimental research of influence of size of peripheral clearance leakage on efficiency small axial turbines, which differ by the exit angle of flow from nozzle blades are resulted. The influence of change size radial clearance on components of losses turbine stage and also on relative internal and «braked» efficiency in a wide range of angles of attack of the rotor blade is defined.

Keywords:

Lapuzin A.V., Lim Chan San, Subbotovich V.P., Yudin Yu.A., Yudin A.Yu. The influence of the angle of exit of the stream from the nozzle grid and the mode of operation of the turbine losses due to leakage through the radial clearance. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 54-59.

An analysis in the effectiveness of a model to calculate the heat transfer coefficient along the external surface of a turbine rotor blade at working modes taking into account the engine individual characteristics is carried out. 10 different engine defects were considered for the verification of the model robustness to changes in the engine gas path and engine working conditions. The formulation and verification of the model is carried out using no-linear thermodynamics models of the engine’s gas path.

Keywords:

Maravilla Errera. K., Epifanov S.V. Analysis of the efficiency of determining the values of heat transfer coefficients on the outer surface of the blade taking into account the individual characteristics of the gas turbine engine. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 60-66.

The article describes the trend of universal electrification systems of modern aircraft and the possibility of using auxiliary power unit, which is structurally different from those used in the aviation industry at the moment. The necessary calculations obtaining quantitative indicators were made.

Keywords:

Kononyhin E.A. The use monovalency design . NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 67-69.

The technology of advanced numerical studies of the stress-strain state (SSS) highly stressed turbine components. The problem is solved in three-dimensional formulation and is based on the finite element method.

Keywords:

Shvecov V.L., Gubskiy A.N., Palkov I.A., Palkov S.A. The strength of the highly stressed elements of the steam turbine. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 70-75.

The problem of creation of mathematical models of erosion of the moist-steam turbine blades exposed to influence of high-speed drop streams is presented. The ways of creation of modern methods of weakening of influence of moisture erosive processes in running part are considered on.

Keywords:

Shubenko A.L., Kovalskiy A.E. Drop-impact erosion of the blades in steam turbines. Prediction and protection methods. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 76-87.

Electrophysical aspects of drop-shock destruction elements of a steam turbines flowing part are considered. It is brought to a focus to features of supercritical destruction of water drops which is accompanied by a complex of the electric charge-discharge phenomena and leads to saturation of metal surfaces by hydrogen which causes degradation of their mechanical properties and accelerates erosive deterioration. Possible mechanisms of occurrence of the electrophysical and electrochemical phenomena which initiate and strengthen the corrosion processes influencing hardness and erosion of constructive elements of steam turbines are discussed.

Keywords:

Tarelin A.A., Surdu N.V., Nechaev A.V. Electrophysical aspects of drop-impact fracture of the passage elements of steam turbines. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 88-96.

Uneven method to define the heterogeneous nucleus concentration is proposed. Method is based on the depending of wet steam expanding in the nozzle from the heterogeneous nucleus concentration. To define the heterogeneous nucleus concentration with this method there is a need to pipe the investigated steam to supersonic nozzle and to measure the steam pressure distribution along the nozzle. Then we need to calculate the pressure distribution along this nozzle for different heterogeneous nucleus concentration in vapor. Calculating the pressure distribution for different heterogeneous nucleus concentration we must to find the concentration for which the calculated pressure distribution coincides with the measured. For that we need the special program, which allowed calculate no equilibrium wet steam expanding in the nozzle.

Keywords:

Sklyarov V.P., Kovalev A.S. Development of physical principles determine the concentration of heterogeneous sardesai condensation in the expanding two-phase region pair. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 97-103.

The enrichment and approach to an estimation of a residual resource of high-temperature elements (cylinders of high and middle pressure) of steam turbines of the big capacity with definition of damages taking into account repair regenerative changes of a design of the steam turbine in operation and experimental researches of features of metal after 220 thousand hours of operation is offered. Are resulted settlement and experimental data of long durability of metal of cylinders of average pressure and residual terms of operation of steam turbines К-800-240 of power units № 7 which worked in different operational conditions.

Keywords:

Chernousenko O.Yu. Evaluation of damage and remaining life of high temperature housings steam turbine K-800-240 Slavic TPP. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 104-111.

or multisupporting fir-tree tail connection of high-rate working shoulder-blades of steam-turbines influence of corner of slant of underlayments of indents is considered on character of his tense state.

Keywords:

Shubenko A.L., Suhinin V.P., Fursova T.N., Boyarshinov A.Yu. The influence of the angle of the bevel of the bearing surfaces of teeth tail joints of turbine blades on the nature of the stress state. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 112-116.

The question of application of the turbine drive of feed pump at the unit 150–200 MW of TPP is considered. Schemes of inclusion of the turbine drive into thermal unit scheme, as well as the economic effect of the feed pump’s rotation adjustment are defined.

Keywords:

Kobcev O.M., Panov V.V., Pugacheva T.N. The use of turbo drive feed pump units 150-200 MW TPP. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 117-123.

The mathematical models and algorithms for determining the effectiveness of the air heater considering the distribution in local thermohydraulic parameters. For stationary gas turbine selected rational design options tubular regenerator.

Keywords:

Ganzha A.N., Marchenko N.A. The improvement of stationary gas turbines with a choice of rational parameters of the regenerator-heater. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 124-128.

This paper is presents main options for future decisions to use alternative refrigerant that provide the required energy efficiency and environmental safety of chillers and heat pumps.

Keywords:

Harlampidi D.H., Bratuta E.G., Sherstyuk A.V., Krupova E.G. Ecological and energy aspects of the translation of existing refrigeration machines and heat pumps on modern refrigerants. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 129-134.

The model of nonlinear vibrations of one disk rotor supported by two journal bearing is obtained. The fluid film in journal bearing is described by the Reynolds’ equation. The influence of the parameters of rotor and bearing on the stability of motion is stydied. The dependences of angular velocity, at which the Hopf bifurcation occurs, of the main parameters of the bearing and rotor is obtained.

Keywords:

Avramov K.V., Borisyuk A.V. The influence of parameters of bearings on the dynamic instability regions of the rotors. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 135-143.

On the base of dynamics laws of continuum of variable mass the compressible fluid stream in the channel with variable cross-section and variable flow volume is considered. The variable flow volume in the channel is caused by bleed-off the path of the working medium along the current. The analytic dependencies of the changes of gas-dynamic parameters on the withdrawal conditions are obtained. The analysis of impact of Mach number, the channel profile and withdrawal conditions on the parameters distribution along the flow is performed. The withdrawal conditions influence on critical parameters values is shown

Keywords:

Gapon G.A. The effect of compressibility of the working medium to flow in channels with variable flow. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 144-150.

In this work, results of experimental research of complex vortex structures in duct flow channel of high-head radial-axial turbines. Improving the flow of the turbine components to reduce energy losses in the hydraulic underwater bodies and the impeller is possible based on the analysis of the vortex structure of turbulent fluid motion in these elements.

Keywords:

Potetenko O.V., Drankovskiy V.E., Grishin A.M., Krupa E.S., Gulahmadov A.A. Analysis of energy losses in high-pressure radial-axial turbines is due to the characteristic features of the structure of the flow in the flow part. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 151-159.

The possibility of technical diagnostics of well repair and development hydraulic units A 50M is considered in the article. Diagnostics is developing algorithms and applying it to different methods of diagnosis by defining the parameters to be measured.

Keywords:

Koval A.A., Koval E.S., Salyga T.S., Fateev A.N., Koren E.A. To the question of diagnostics of hydraulic units. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 160-164.

The Organized analysis to value to unifications element to designs, is chosen parametric relationship size of mass- factors to designs and level to labors content her production. The Interpreted sequence of the main trends and methods of the realization to constructive unification for turbo-alternator with air system of the cooling for the reason, optimize the size mass- parameters, without increase level to labors content in production.

Keywords:

Minko A.N., Kuzmin V.V., Shevchenko V.V. Evaluation of parametric relations dimensional parameters of turbogenerators with the level of complexity of their production. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 165-169.

Diagrams of power installations of thermosorption compressor with hydrogen turbine for utilization of exhaust gases have been analyzed. The effective capacity and efficiency of plants and lower specific fuel consumption per unit of capacity has been increased.

Keywords:

Koshelnik O.V., Chorna N.A. Development and analysis of highly efficient hydrogen power installations circuits. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 170-173.

The nonlinear mathematical model of laser heating of bodies with coatings has been developed on the basis of the hyperbolic heat conduction equation in which the absorption of laser energy, depending on the parameters of the pulse is described by the volume or surface source of heat. Calculated temperature fields by approximate analytical method for solving nonlinear boundary problems for hyperbolic systems of equations of thermal conductivity, and temperature fields are compared with those obtained on the basis of the corresponding linear models.

Keywords:

Malaya Yu.A., Gubin A.I. Mathematical modeling of laser heating of bodies with coatings based on nonlinear hyperbolic heat conduction equation. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 174-180.

The algorithm of undivided decomposition of equations by two variables with the choice of the rational scheme of decomposition developed by the author is described. The algorithm allows to eliminate the surplus of scheme decisions and choose the most acceptable scheme only according to the form of remaining functions that can be got as a result of decomposition of this function after the Shannon’s formula. Application of the algorithm is shown on the concrete example.

Keywords:

Polushkin K.A. To the question of synthesis schemes pneumatic units. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 181-184.

The problem of heat and humidity treatment of concrete with the use of such enernonositeley as water vapor, a mixture of flue gases and ambient air, and electric heating. A comparison and choice of energy source in terms of both energy and economic indicators.

Keywords:

Koshelnik V.M., Shulgin Yu.V., Glinko O.I. Calculation, analysis and selection of the sound energy needed to cartridge installation for processing thermal concrete products. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 185-188.

This article is about the method used to calculate thermochemical conversions in methanol reactor: the calculation of the heated thermal medium (exhausted gases) and the amount of cataclyst, determination of reactor’s size and thermal efficiency (heat emission) of intertubular space.

Keywords:

Baranov V.Yu., Astashov R.N. The method of calculation of thermochemical conversion reactor of methanol. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2012. No. 7. Pp. 189-193.