scholarly journals Development of the flow part of reactive type HPC of K-325-23,5 series steam turbine based on the use of modern computer technologies

2021 ◽  
Vol 24 (4) ◽  
pp. 6-16
Author(s):  
Andrii V. Rusanov ◽  
◽  
Viktor H. Subotin ◽  
Viktor L. Shvetsov ◽  
Roman A. Rusanov ◽  
...  
Keyword(s):  
Steam Turbine ◽  
Turbulent Flows ◽  
Software Package ◽  
High Pressure Cylinder ◽  
Modern Computer ◽  
Gas Dynamic ◽  
Analytical Construction ◽  
Pressure Cylinder ◽  
Flow Part ◽  
Spatial Shape

The results of gas-dynamic design of a new flow part of a reactive type high-pressure cylinder (HPC) of the K-300 series condensing steam turbine are presented. The turbine was developed using a comprehensive methodology implemented in the IPMFlow software package. The methodology includes gas-dynamic calculations of various levels of complexity, as well as methods for analytical construction of the spatial shape of the blade rows based on a limited number of parameterized values. The real thermodynamic properties of water and steam were taken into account in 3D calculations of turbulent flows. At the final stage, 3D end-to-end calculations of the HPC, which consists of 18 stages, were carried out. The technology of parallel computing was applied in the said calculations. It is shown that a significant increase in efficiency and power has been achieved in the developed HPC due to the use of reactive type stages with modern smooth blade profiles and monotonic meridional contours.

scholarly journals Heating modes and design optimization of cogeneration steam turbines of powerful units of combined heat and power plant

Energetika ◽  
2019 ◽  
Vol 65 (1) ◽  
Author(s):  
Andrey Rusanov ◽  
Aleksandr Shubenko ◽  
Oleksandr Senetskyi ◽  
Olga Babenko ◽  
Roman Rusanov
Keyword(s):  
Steam Turbine ◽  
Turbulent Flows ◽  
Software Package ◽  
Technical Problem ◽  
Three Dimensional ◽  
Software Systems ◽  
Steam Turbines ◽  
Rational Distribution ◽  
Flow Part ◽  
Numerical Research

An important scientific and technical problem of increasing the efficiency of CHP steam turbine units through the optimization of their operation modes and the creation of new highly efficient flow parts of cogenerating turbines is solved. Solutions to the problem of rational distribution of heat loads between the network heaters of cogeneration turbines during the heating period are presented. The calculations were performed using the software package SCAT which was developed in IPMach NAS of Ukraine. The carrying out of calculations of three-dimensional turbulent flows in flow parts of turbines using modern software systems is an effective direction of increased efficiency of power equipment. For the numerical research of three-dimensional currents, steam in the flow part of the steam turbine software package IPMFlow which is developed in IPMach NAS of Ukraine is used. With the use of software package IPMFlow, the researches of three-dimensional currents steam in the flow part of the medium pressure cylinder of the steam turbine of series T-100-130 are carried, which showed the feasibility of optimizing the geometry of the flow part in order to improve gas-dynamic characteristics of blades apparatuses.

Optimal design of the high-pressure cylinder flow path in updating the T-100-12.8 steam turbine

2007 ◽  
Vol 54 (4) ◽  
pp. 272-275 ◽  
Author(s):  
N. N. Gudkov ◽  
A. N. Babiev ◽  
V. I. Kirillov ◽  
S. A. Koshelev ◽  
O. N. Petrova ◽  
...  
Keyword(s):  
High Pressure ◽  
Optimal Design ◽  
Steam Turbine ◽  
Flow Path ◽  
High Pressure Cylinder ◽  
Pressure Cylinder ◽  
Cylinder Flow

scholarly journals Investigation of the Thermal Strength of Steam Turbine Diaphragms with Reduction of Axial Dimensions

2021 ◽  
Vol 24 (2) ◽  
pp. 37-49
Author(s):  
Borys P. Zaitsev ◽  
Viktor L. Shvetsov ◽  
Oleksandr M. Hubskyi ◽  
Serhii A. Palkov ◽  
Tetiana V. Protasova
Keyword(s):  
High Pressure ◽  
Steam Turbine ◽  
Cross Sections ◽  
Guide Vane ◽  
Flow Characteristics ◽  
Calculated Data ◽  
High Pressure Cylinder ◽  
Guide Vanes ◽  
Third Stage ◽  
Pressure Cylinder

The problem of reducing the axial dimensions of steam turbine diaphragms is associated with the problem of steam turbine modernization performed by increasing the number of reactive blading stages and using existing foundations. Evaluation of the suitability of diaphragm design versions with established steam flow characteristics was carried out with constraints on short- and long-term strength conditions, as well as the accumulation of axial deflections due to creep. For computational research, there was introduced a methodology using the finite element method and Yu. M. Rabotnov’s theory of strain aging. The calculation of creep was reduced to solving an elastic-plastic problem with a deformation curve, which was represented by an isochronous creep curve for the time chosen. A software was used providing for the automated construction of the original computer diaphragm model with the help of guide-vane profile drawings and axial cross-sections of the diaphragm rim and body, as well as several geometric parameters. The calculated model of a welded diaphragm reproduces the main essential features of the structure, the material properties of its elements, as well as steam load. The exploratory studies of diaphragms with reduced axial dimensions were performed on the example of the second- and third-stage diaphragms of the high-pressure cylinder of the K-325-23.5 steam turbine. The original second- and third-stage diaphragm designs were considered to be basic, in relation to which, according to strength and rigidity parameters, the alternative ones were compared. Calculated data for the basic diaphragm design versions for 100 thousand operating hours were obtained. According to the calculations, maximum deflections are achieved at diaphragm edges, and the stresses, that are maximum at the points where the guide vanes are attached to the diaphragm rim and body, undergo a significant redistribution due to creep. Two approaches to the reduction of the axial dimensions of the second-stage diaphragm design of the steam turbine high pressure cylinder were involved. In the first approach, the reduction of the dimensions was achieved by proportionally reducing the guide-vane profile with a corresponding increase in the number of the guide vanes. In the second approach, the profile remained unchanged, but the axial dimensions of the diaphragm rim and body were reduced. The parameters of strength both in the elastic state at the beginning of operation and in the conditions of creep, as well as the accumulation of axial deflections were investigated. Based on the comparisons with the basic design, it was established that the second approach is more effective. Additional recommendations for the use of more heat-resistant steels for outlet guide vanes and the conditions of diaphragm attachment in the turbine casing are given.

scholarly journals Creepage of the Inner Shell of the High-Pressure Cylinder of the Steam Turbine К-325-23.5

2020 ◽  
Vol 0 (2) ◽  
pp. 19-23
Author(s):  
Pavel Petrovich Gontarovskiy ◽  
Nikolay Grigor'evich Shulzhenko ◽  
Nataliya Grigor'evna Garmash ◽  
Alla Aleksandrovna Glyadya
Keyword(s):  
High Pressure ◽  
Steam Turbine ◽  
High Pressure Cylinder ◽  
Pressure Cylinder

scholarly journals Experimental and Theoretical Research of a Hot Condition of High Pressure Cylinder of the T-100-130 Steam Turbine

2019 ◽  
Vol 62 (5) ◽  
pp. 459-468
Author(s):  
V. A. Kudinov ◽  
E. V. Kotova ◽  
O. Yu. Kurganova ◽  
V. K. Tkachev
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Thermal Conductivity ◽  
High Pressure ◽  
Steam Turbine ◽  
Temperature Difference ◽  
High Pressure Cylinder ◽  
Temperature State ◽  
Pressure Cylinder ◽  
Stationary Operation

The results of experimental and theoretical studies of the temperature state of the high- pressure cylinder (HPC) of the T-100-130 steam turbine for one of the start modes are presented. Taking into account the dependence of the coefficient of linear expansion on the temperature, the elongations of the individual sections of the casing under different temperatures and its total elongation after the turbine operation starts to correspond to the stationary operation mode have been found. The studies have shown that in the process of actuation the turbine there is a significant difference in temperature along the length of the HPC casing. In this case, the most intense heating occurs in the area from the second to the sixth section. The greatest temperature difference was observed in stationary operation at maximum temperature in the fifth section. Using the orthogonal method of L. V. Kantorovich, an approximate analytical solution of the thermal conductivity problem for a two-layer wall (turbine casing – thermal insulation) under inhomogeneous boundary conditions of the third kind is obtained. With the use of experimental data on the temperature state of the outer surface of the casing of the HPC by solving the inverse problem of thermal conductivity, the average heat transfer coefficients for the actuation period characterizing the intensity of heat transfer from steam to the casing have been found. On the basis of experimental data on the temperature change of any of the controlled parameters of the turbine over time, a theoretical method for predicting its change in a certain time range from the time of the its last measurement has been developed. The use of this method to predict the change in the temperature difference between the top and bottom of the HPC casing during the actuation showed that for a period of time equal to 3–5 minutes the forecast is fulfilled with high reliability.

scholarly journals The Gas-Dynamic Efficiency Increase of the K-300 Series Steam Turbine Control Compartment

2020 ◽  
Vol 23 (4) ◽  
pp. 6-13
Author(s):  
Andrii V. Rusanov ◽  
◽  
Viktor L. Shvetsov ◽  
Anna I. Kosianova ◽  
Yurii A. Bykov ◽  
...  
Keyword(s):  
Steam Turbine ◽  
Stokes Equations ◽  
Navier Stokes ◽  
Dynamic Efficiency ◽  
Navier Stokes Equations ◽  
Gas Dynamic ◽  
Operation Modes ◽  
Flow Part ◽  
Object Of Study ◽  
Control Compartment

The paper proposes ways to increase the efficiency of nozzle control for steam power turbines of the K-300 series, that, along with the K-200 series turbines, form the basis of thermal energy in Ukraine. The object of study is considered to be the control compartment (CC) of the high-pressure cylinder (HPC) of the K-325-23.5 steam turbine. In the paper, the calculation and design of the control compartment of the steam turbine was performed using the complex methodology developed in IPMach NAS of Ukraine, that includes methods of different levels of complexity, from one-dimensional to models for calculation of spatial viscous flows, as well as analytical methods for spatial geometries of flow parts description based on limited number of parameterized values. The complex design methodology is implemented in the IPMFlow software package, which is a development of the FlowER and FlowER–U software packages. A model of a viscous turbulent flow is based on the numerical integration of an averaged system of Navier-Stokes equations, for the closure of which the two-term Tamman equation of state is used. Turbulent phenomena were taken into account using a SST Menter two-parameter differential turbulence model. The research was conducted for six operation modes in the calculation area, which consisted of more than 3 million cells (elementary volumes), taking into account the interdiscand diaphragm leakage. According to the results of numerical studies of the original control compartment of the K-325-23.5 steam turbine, it is shown that the efficiency in the flow part is quite low in all operation modes, including the nominal one (100% power mode), due to large losses of kinetic energy in the equalization chamber, as well as inflated load on the first stage. On the basis of the performed analysis of gas-dynamic processes, the directions of a control compartment flow part modernization are formed and themodernization itself is executed. In the new flow part, compared to the original one, there is a favorable picture of the flow in all operation modes, which ensures its high gas-dynamic efficiency. Depending on the mode, the efficiency of the control compartment increased by 4.9–7.3%, and the capacity increased by 1–2 MW. In the nominal mode (100% mode) the efficiency of the new control compartment, taking into account the interdisc and overbandage leakage, is 91%.

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