In the given paper model of computation of nozzle steam allocation with the given flow of a working body is considered, in which the task of position of shutoff elements of regulated valves is decided with the support of combinatorial algorithm. Thus loading between the segments of a regulating stage distributes in such a manner that for each given steam flow close to maximum possible capacity of a regulating stage is reached. The model is included in the integrated information space CAD «Turboagregat» that is designed for solving the tasks of optimum synthesis and analysis of construction of axial turbines, taking into account the modes of their operation.

Keywords:

Boiko A.V., Usaty A.P. Combinatorial algorithm for guidance of regulated valves for system of nozzle steam distribution. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 5-14.

The numerical results for aeroelastic interaction of the blade rows of five stage axial compressor in 3D ideal gas flow have been presented. There shown that the principal contribution in unsteady loads is brought by the harmonics with frequencies which are equal to the product of rotation frequency on the stator blades numbers, but principal contribution in blades oscillations is brought by autooscillations with frequency closed to the first natural frequency.

Keywords:

Gnesin V.I., Kolodyazhnaya L.V. The aeroelastic interaction of blade rows in five stages axial compressor in 3d ideal gas flow. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 15-24.

The conception of the new CFD solver for 3D turbomachinery flow simulation using RANS equations is considered. Realisability constraints and special boundary conditions for adverse pressure gradient flows are shown to be important. The numerical results for some test cases are presented.

Keywords:

Yershov S.V., Yakovlev V.A., Derevyanko A.I., Grizun M.N., Kozyrets D.A. Development of software system for computations of 3d viscous compressible flow in turbomachinery blade rows. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 25-32.

An approach to the approximation of the equations of state for water and steam International Standard IAPWS-95 for numerical simulation of 3-D flows of steam in the flowpart of turbomachinery, which provides sufficient accuracy of the thermodynamic quantities in the whole range of modern and advanced steam turbines.

Keywords:

Rusanov A.V., Paschenko N.V. Using the system of thermodynamic properties of water and steam iapws-95 for the three-dimensional viscous flow in the flowpart of steam turbine. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 33-39.

The algorithm of optimal design turbine cascade with assistance aerodynamic inverse problem, which to take account limitation on strength is introduce. The new profile of stator cascade which has local wavy contours and the coefficient of total losses is much lower, than at an initial cascade of atlas profile is designed.

Keywords:

Yudin A.Yu. The algorithm of optimal design axial turbine nozzle cascade with assistance aerodynamic inverse problem. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 40-44.

The article represents results of investigation of leading edge shape influence on aerodynamic efficiency of high-loaded turbine cascade. The investigation are executed by calculated method for 2D viscous compressible gas flow using the CFD code FlowER. The advices for design of high-loaded profile are given.

Keywords:

Khomylev S.A., Rudenko V.T., Lyusina A.V. Numerical investigation of leading edge shape influence on turbine cascade efficiency. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 45-50.

The parametrical model of a turbine blade profile is described. Statement of a research problem with the description of a profile varied geometrical parameters and used methods is resulted. Comparison of calculations results of a potential and viscous flow of a base profile is presented. Results of a guide blade profile optimization with use of two calculation methods are resulted.

Keywords:

Boiko A.V., Govorushchenko Yu.N., Burlaka M.V., Barannik V.S. To the question on the turbine blade profiles optimization. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 51-54.

Experimental investigation structure of flow at peripheral zone of large-scale model modern last stage standard LPC powerful steam turbine is resulted. Behind nozzle and rotor blades parameters was measured. Coefficients flow rate and flow rate of peripheral leakage over rotor blade at different regime of operation stage are defined.

Keywords:

Lapuzin A.V., Subotovich V.P., Yudin Yu. A. Specific character structure of steam flow at peripheral zone of modern last stage lpc. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 55-59.

The dependence, which based on results of experimental investigation of turbine stages, for determination of energy consumption at mode of operation lower than idle-running was suggested.

Keywords:

Bystritskiy L.N., Goloshchapov V.N., Kasilov V.I., Kozlokov A.Yu., Shubenko A.L. The energy consumption of turbine stage at low flow rate mode of operation . NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 60-63.

The settlement and experimental research of long durability of metal rotor’s steels 25Х1М1ФА steam turbines of power units by capacity 200 MWt, the 220 thousand which have fulfilled in actual practice more ч is spent. Races-even research it is based on the account of damaged according to not destroying control of the power equipment to experimental researches of long durability real rotor. Experimental research is based on studying of damaged according to not destroying control of the power equipment and to settlement researches of a residual resource of high-temperature elements of steam turbines by capacity 200 MWt.

Keywords:

Chernousenko O.Yu., Nikylenkova T.V. Extension of operating rotor of steam turbine 200 mw based on curves long hours of strength steel with extra park resources. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 64-70.

Questions, related to exhausting of resource of high temperature knots of turbine, are considered. Factors, determining duration of reliable exploitation of turbine, are resulted: exhausting of the protracted plasticity from the creep of material; accumulation of damages in the critical areas of rotors from a small of cycle of fatigue

Keywords:

Sukhinin V.P., Kanyuk G.I., Pugachova T.N., Lavrinenko T.A. Analysis of reasons for a resource full of steam turbine. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 71-75.

Problem of turbo-installation operational efficiency increasing at the modes with minimal steam passage into the condenser was studied. It is proposed to use the vapor compression heat pump (VCHP) for the useful utilization of this steam’ heat as well as for the elimination of ventilation effect and improvement of operational conditions of the last turbine’s stages. Design procedure of fuel economy at the VCHP inclusion into the heat diagram is shown.

Keywords:

Panov V.V. Determination of turbo-installation operational efficiency at the utilization of heat of minimal steam passage into the turbine’s condenser with the help of vapor compression heat pump (vchp). NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 76-82.

The characteristics and the experience to develop three energy conservation projects (two of them implemented) the installation of steam turbines for small power plants: coke, mining industries and municipal energy sector of Ukraine.

Keywords:

Babak N.Yu. Experience energy saving with steam turbine low power. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 83-89.

There are shown the correctness of the numerical model by comparing the results of the study flow and characteristics of the variable inlet guide vane with rotating blades for a centrifugal compressor, which is obtained by numerical and physical experiments.

Keywords:

Bondarenko G.A., Yurko I.V. A comparison of the results of numerical and physical studies regarding variable inlet guide vane for centrifugal compressor. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 90-94.

The complex calculations method of the convective cooling system including the results of computational fluid dynamics of the combustion processes was described.

Keywords:

Serbin S.I., Mostipanenko G.B. The development of the convective cooling system of the combustion chamber for 25 mwt gas turbine engine. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 95-100.

Fundamental problems of gasdynamic instability have been considered. The criteries of static and dynamic instability are received. The attention take into consideration acoustic impedance of gasdynamic instability.

Keywords:

Gerasimenko V.P., Dehghani M., Ghaemian S. Prognostication of unsteady regimes GTE. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 101-104.

On the basis of numeral design the self-reactance analysis of transients of tubular two-thread heat-exchange vehicle is conducted. A heat-exchange vehicle is examined as an object with distributive parameters. The executed decisions allowed to get transitional descriptions of heat-exchange vehicle depending on the rate of change of temperature of warming heat-carrying agent for the row of characteristic values of aquatic numbers of heat-carrying agents.

Keywords:

Shevelev А.А., Tarasenko A.N., Barvinok V.S. Transitional characteristics of two-thread tubular heat-exchange device. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 105-108.

Lamellar heat exchangers with enlarged channel width are suggested to use as evaporators for thermal technological schemes. The results of theoretical and experimental investigations of heat exchange during boiling in vertical channels are presented. The new criterial dependences for calculation of heat exchange intensity are proposed.

Keywords:

Koshelnik V.М., Fokin V.S., Koshelnik A.V., Zbaraz L.J. Theoretical and experimental investigations of heat exchange in lamellar evaporator. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 109-117.

The heat transfer when applying water dispersed on high temperature surface was investigated. The influence of mean-time irrigating density on specific heat-flux is presented. It is shown that heat flux is reduced compared with continuous supply of drops.

Keywords:

Peresylkov A.R. Heat transfer in a pulsed supply of water dispersed on high temperature surface. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 118-120.

The mathematical model of thermal processes at surface strengthening of multilayer constructions elements has been developed on the basis of the generalized heat conduction law. The proposed model takes into account the finite speed of heat propagation and nonideal thermal contact at the junctions of layers. The boundary problem is solved by an operational method. The study of the obtained solution and calculations of temperature fields have been performed.

Keywords:

Veselovskiy V.B., Malaya Yu.A., Gubin A.I., Lyashenko V.I. The mathematic modeling of thermal processes at surface strengthening of constructions elements . NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 121-128.

The choice of method of calculation and determination of correlations is examined for finding of quantitative descriptions of indexes of faultlessness of hydrounits and pneumounits. The calculation of quantitative indexes of faultlessness is conducted and got algorithm for the calculation of quantitative reliability indexes on the stage of planning.

Keywords:

Fatieieva N.М. Algorithm of calculation of quantitative indexes of faultlessness in systems of hydrounits and pneumounits on the stage of their synthesis. NTU «KhPI» Bulletin: Series «Power and Heat Engineering Processes and Equipment». 2011. No. 5. Pp. 129-135.