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    Wyświetlanie 1-6 z 6
    Tytuł:
    Two-tier low pressure cylinders for condensing steam turbines
    Autorzy:
    Zaryankin, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/175404.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    two-tier stage
    two-tier low pressure cylinder
    fork-shaped blade
    Opis:
    The paper deals with new construction of low pressure cylinder (LPC) for condensing steam turbines. The flow path of these cylinders is formed on the base of new two-tier stages. As opposed to well known Baumann’s stages newer two-tier stages is a combination of two independent stages with own blades set. Such construction allows to decrease the number of LPC in the existing turbines or to ensure their operation with very high vacuum in the condenser or increases in 1.5 times power capacity of new turbines without increasing of the last stage blade length and LPC number.
    Źródło:
    Transactions of the Institute of Fluid-Flow Machinery; 2014, 126; 123-130
    0079-3205
    Pojawia się w:
    Transactions of the Institute of Fluid-Flow Machinery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technical solution for improve the efficiency of the steam turbines
    Autorzy:
    Bilyk, Y.
    Martsinkovsky, V. S.
    Nosowa, O.
    Tarelnik, V.
    Yurko, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/175480.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    two-tier stage
    two-tier low pressure cylinder
    fork-shaped blade
    Opis:
    This paper presents effective ways to increase the carrying and reliability of thrust bearings. Technical solutions implemented by TRIZ Ltd have been considered. In comparative characteristics of the bearing took into account such factors as: capacity, peripheral speed at the average radius, speed at the periphery, specific pressure, specific lubricant consumption. Comprehensive analysis of the working conditions of bearing was aimed to protect against electroerosion.
    Źródło:
    Transactions of the Institute of Fluid-Flow Machinery; 2015, 130; 31-55
    0079-3205
    Pojawia się w:
    Transactions of the Institute of Fluid-Flow Machinery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of innovative solutions to improve the efficiency of the LPC flow part of the 220 MW NPP steam turbine
    Autorzy:
    Rusanov, Andrii
    Subotin, Viktor
    Shvetsov, Viktor
    Rusanov, Roman
    Palkov, Serhii
    Palkov, Ihor
    Chugay, Marina
    Powiązania:
    https://bibliotekanauki.pl/articles/2091359.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    steam turbine
    low-pressure cylinder
    flow part
    meridional contours
    spatial flow
    computational investigation
    Opis:
    The results of the gas-dynamic calculation of the low-pressure cylinder flow part of the K-220-44 type steam turbine intended for operation at nuclear power plants are presented. The ways of the flow part improvement were determined. Some of those ways include the use of innovative approaches that were not previously used in steam turbines. The design of the new flow part was carried out on the basis of 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 tracts 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 step, end-to-end 3D calculations of the lowpressure cylinder that consists of 5 stages were performed. The technology of parallel computing was applied in those calculations. It is shown that due to the application of innovative solutions, a significant increase in efficiency can be achieved in the developed low-pressure cylinder.
    Źródło:
    Archives of Thermodynamics; 2022, 43, 1; 63--87
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling 3D steam turbine flow using thermodynamic properties of steam IAPWS-95
    Autorzy:
    Rusanow, A. V.
    Lampart, P.
    Pashchenko, N. V.
    Rusanov, R. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/258730.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    three-dimensional viscous flow
    steam turbine
    low-pressure cylinder
    sets of equations of state for water and steam IAPWS-95
    approximations of equations
    Opis:
    An approach to approximate equations of state for water and steam (IAPWS-95) for the calculation of three-dimensional flows of steam in turbomachinery in a range of operation of the present and future steam turbines is described. Test calculations of three-dimensional viscous flow in an LP steam turbine using various equations of state (perfect gas, Van der Waals equation, equation of state for water and steam IAPWS-95) are made. The comparison of numerical results with experimental data is also presented.
    Źródło:
    Polish Maritime Research; 2016, 1; 61-67
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use of pumping units equipped with oscillating hydraulic pressure intensifiers for displacement of cylinders with heavy loads over the entire stroke
    Autorzy:
    Popescu, Teodor-Costinel
    Chiriță, Alexandru Polifron
    Popescu, Ana-Maria Carla
    Popescu, Alina-Iolanda
    Powiązania:
    https://bibliotekanauki.pl/articles/27324338.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Techniki Górniczej KOMAG
    Tematy:
    low-pressure pumping unit
    oscillating hydraulic pressure intensifier
    high pressure
    hydraulic cylinder
    Opis:
    Working and moving in confined, limited and narrow spaces, specific to underground mining activities, also requires the use of hydraulically operated equipment, capable of developing large forces, with small dimensions. An example of such equipment includes pumping units comprising low-pressure electric pumps and oscillating hydraulic pressure intensifiers. They use low pressure in the primary side of the intensifier and generate high pressure in the secondary side of the intensifier. Such pumping units are usually used to achieve and maintain high pressure, either in the volumes of closed spaces (in strength tests on pipes and tanks) or at the end of the active stroke of hydraulic cylinders (in hydraulic presses). On an experimental laboratory bench, which comprises a test cylinder, powered by a pumping unit, equipped with an oscillating hydraulic pressure intensifier, and a load cylinder, powered by another pumping unit, with the possibility of load control, the authors show that: the application range of these pumping units can be extended in the third direction, too, useful for underground mining activities, namely for drive of hydraulic cylinders with low gauge / displacement speeds and constant high load (high working pressure) over the entire working stroke length; the uniformity of displacement of these cylinders, with load throughout the stroke length, which are powered and driven with such pumping units, is slightly affected by the pulsating mode of operation of the hydraulic pressure intensifier. A set of experimental measurement results is presented for a constant value of the load over the entire displacement stroke of the test cylinder.
    Źródło:
    Mining Machines; 2022, 40, 4; 238--248
    2719-3306
    Pojawia się w:
    Mining Machines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Marine diesels working cycle monitoring on the base of IMES GmbH pressure sensors data
    Autorzy:
    Neumann, Stefan
    Varbanets, Roman
    Kyrylash, Olena
    Maulevych, Vladyslav
    Yeryganov, Oleksiy
    Powiązania:
    https://bibliotekanauki.pl/articles/327592.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    diesel engine
    cylinder pressure monitoring
    top dead center
    gas pressure sensor
    Butterworth low-pass filter
    mean indicated pressure
    indicator valve channel
    silnik spalinowy
    czujnik ciśnienia
    monitorowanie
    wydajność
    Opis:
    The paper presents algorithms for marine diesel engines’ working process monitoring designed by analyzing data obtained with IMES pressure sensors. Main features and properties of IMES sensors, used for 2- and 4-stroke modern marine diesel engines, are presented here. The pressure-time diagrams were taken as a basis for creating algorithms for marine diesel engines’ working process monitoring. The task of preliminary calculation of top dead center position (TDC) of a cylinder was solved using polytropic compression equation. TDC position was calculated using the equation P' = 0. Then algorithm for calculating the average indicator pressure and the indicator power of the cylinder has been determined. The CFD methods show how indicator valve channel influences the results of marine diesel engines’ working process monitoring. With the example of compression curves in a cylinder, it’s shown amplitude and phase distortions introduced into pressure measurements by the indicator valve channel. Such research work is important and actual in time due to the use of marine diesel portable performance analysis systems.
    Źródło:
    Diagnostyka; 2019, 20, 2; 21-26
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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