Temat: turbine - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of inlet geometry on the efficiency of 1 MW steam turbine
Autorzy:: Koprowski, Arkadusz
Gotowski, Dominik
Rzadkowski, Romuald
Szczepanik, Ryszard
Powiązania:: https://bibliotekanauki.pl/articles/950128.pdf
Data publikacji:: 2019
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: turbine engine
steam turbine
turbine inlet
Opis:: The process of the design of the 1 MW steam turbine includes designing the stator and rotor blades, the steam turbine inlet and exit, the casing and the rotor. A turbine that operates at rotation speeds other than 3000 rpm requires a gearbox and generator with complex electronic software. This article analyses the efficiency of eight turbine variants, including seven inlet geometries and three stages of stator as well as an eight variant with one of the inlets, all three stages and an outlet. This article analyses the efficiency of 8 turbine variants, including four spiral inlet geometries and tree stages in a 1 MW steam turbine. In the article, inlets and 1st stator blades of various geometries were analysed to obtain maximal turbine efficiency. Changing the inlet spiral from one pipe to two pipes increased the turbine efficiency. The geometry of the blades and turbine inlets and outlet was carried out using Design Modeller. The blade mesh was prepared in TurboGrid and inlet in ANSYS Meshing.
Źródło:: Journal of KONES; 2019, 26, 4; 119-126
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Comparison of methods for the determination of Tesla turbine performance
Autorzy:: Rusin, Krzysztof
Wróblewski, Włodzimierz
Strozik, Michał
Powiązania:: https://bibliotekanauki.pl/articles/280194.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: Tesla turbine
roughness
radial turbine
Opis:: A numerical and experimental investigation of the Tesla turbine is presented in the paper. The experiment is conducted for various inlet pressure and load. The roughness of the rotor disc is determined as it is a key factor to obtain high turbine efficiency and power. The numerical investigations are performed for the same conditions as in the experiment. The computational results are compared with the analytical model. Comparison of performance characteristics show a relatively good agreement between the experiment and CFD. The analytical model overestimates distributions of pressure and circumferential velocities, although the predicted power is on the similar level as in the experiment and CFD.
Źródło:: Journal of Theoretical and Applied Mechanics; 2019, 57, 3; 563-575
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Design-point, off-design meanline performance analysis and CFD computations of the axial turbine to micro gasturbine engine
Autorzy:: Bar, W.
Czarnecki, M.
Powiązania:: https://bibliotekanauki.pl/articles/245777.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: turbine
gasturbine
axial turbine
micro
CFD
Opis:: Presented paper consists detailed analysis of the turbine to micro gasturbine. Calculatios was made for axial turbine with given mass flow rate m=0.15 [kg/s] and total inlet temperature T3*=950 [K]. The results of Design-Point, Off-Design Meanline Performance analysis and CFD computation are presented. The differences between typical size gasturbine turbines and turbines to micro-gasturbines are highlighted and some guidelines for designers of microgasturbines are given. As a major conclusions for designers of microgasturbines there is a considerations that require to be very carefull and forewarn that typical corelations for commercial gas turbines could't be take it as granted. In particular, compression ratio — solution possibility, micro gasturbine rotor speed,turbine expansion ratio Pi T as a function of compressor and turbine efficiency, efficiency of turbine as a function of reynolds number for constant specific speed coefficient and constant specific diameter coefficient,turbine to micro gasturbine performance map for different normalized rotational speed, 2D and 3D contour plots of entropy, relative Mach number at middle cut of the blade, static pressure at middle cut of the blade are presented in the paper.
Źródło:: Journal of KONES; 2009, 16, 4; 9-16
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Microstructure analysis in the creep process of a gas turbine blade of the turbine engine
Autorzy:: Błachnio, J.
Kułaszka, A.
Ziętara, M.
Czyrska-Filemonowicz, A.
Powiązania:: https://bibliotekanauki.pl/articles/133291.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: turbine engine
turbine blade
loads
microstructure
rafting
Opis:: The technical condition of gas turbine blades of the turbine engine has a significant impact on the reliability and life span of the turbine and the entire engine. In order to assess the blades’ technical condition, a visual method, with the use of optoelectronic devices, is used. In order to verify this assessment, metallographic tests are conducted. The paper presents the results of microstructural tests of the turbine rotor blades made of nickel-based monocrystalline super alloys. The aim of these tests was to determine the consequences of impacting high exhaust gas temperature and stresses occurring during operation on the stability of the blade microstructure. The progress level of the blade microstructure changes in the post-operational stage for different sections towards the blade vertical axis and was compared with the blade microstructure on delivery made of the same super alloy. A varied degree of the microstructure degradation for different blade sections was shown. The changes typical of the high-temperature creep process – γ' phase directional growth (rafting), were observed only for the thinnest walls of the upper section of the turbine blade leaf.
Źródło:: Combustion Engines; 2016, 55, 2; 41-45
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Adjustable (rotated) stator blade aerodynamics in adaptive control of extraction/condensing turbines
Autorzy:: Lampart, P.
Powiązania:: https://bibliotekanauki.pl/articles/175580.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: LP turbine
turbine stage group
adaptive control
Opis:: Cogeneration of electric energy and heat as well as seasonal changes of the condenser pressure in low-pressure extraction/condensing turbines require adaptive control to adapt the geometry of the blading system to the changing ﬂow conditions. In this paper adaptive control is achieved by means of restaggering (rotating) adjustable stator blades. An increase of turbine eﬃciency and power coming from adaptive control is numerically estimated for a group of two exit stages of an extraction/condensing turbine of power 60 MW. The calculations are made with the help of a computer code FlowER – a 3D solver of turbomachinery ﬂows based on Reynolds-averaged Navier-Stokes equations for perfect gas.
Źródło:: Transactions of the Institute of Fluid-Flow Machinery; 2018, 141; 41-52
0079-3205
Pojawia się w:: Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Parametric analysis of the efficiency of the combined gas-steam turbine unit of a hybrid cycle for the FPSO vessel
Autorzy:: Serbin, Serhiy
Washchilenko, Nikolay
Dzida, Marek
Kowalski, Jerzy
Powiązania:: https://bibliotekanauki.pl/articles/2033277.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: combined-cycle
gas turbine
steam turbine
power plant
Opis:: A thermal diagram of the combined gas‒steam turbine unit of a hybrid cycle, which is an energy complex consisting of a base gas turbine engine with a steam turbine heat recovery circuit and a steam-injected gas turbine operating with overexpansion, is proposed. A mathematical model of a power plant has been developed, taking into consideration the features of thermodynamic processes of simple, binary, and steam-injected gas‒steam cycles. Thermodynamic investigations and optimization of the parameters of a combined installation of a hybrid cycle for the generation of electrical energy have been carried out. Three-dimensional calculations of the combustion chamber of a steam-injected gas turbine were carried out, which confirmed the low emissions of the main toxic components.
Źródło:: Polish Maritime Research; 2021, 4; 122-132
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: An investigation of hot spot location at turbine inlet – numerical simulations for factor project test rig
Autorzy:: Flaszyński, P.
Piotrowicz, M.
Powiązania:: https://bibliotekanauki.pl/articles/175205.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: turbomachinery
gas turbine
hot spot
combustor-turbine interaction
Opis:: The main objective of the presented paper is the investigation of a ﬂow structure and parameters distribution downstream of combustor simulator and its eﬀect on turbine inlet. The investigations are carried out by means of numerical simulations for combustor and turbine nozzle guide vane conﬁguration existing at test rig in DLR Goettingen. As the eﬀect, the hot spot location for diﬀerent relative positions of the swirler and nozzle guide vanes is shown. The presented results are obtained within a pre-test simulations supporting the ﬁnal design of the test section and they allow to draw conclusions for the required limiting cases investigated experimentally. The location of the hot spot is highly important for thermal loading of the ﬁrst stage rotor.
Źródło:: Transactions of the Institute of Fluid-Flow Machinery; 2017, 135; 101-115
0079-3205
Pojawia się w:: Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Mass model of microgasturbine single spool turbojet engine
Autorzy:: Czarnecki, M.
Powiązania:: https://bibliotekanauki.pl/articles/247344.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: gas turbine
micro gas turbine
mass model
Schreckling
turbojet
Opis:: Presented paper consists detailed mass model of micro gas turbine single spool turbojet in well-known Scheckling design layout (1R/1A). One of major criteria in aviation is weight that is granted by airworthiness requirements. At present, exempt from certification process are RC airplanes or UAV with total take-off weight less than 22.5 kg. From the 70's mass model was added as a part of aero engines design process. Engine weight affects airplane or UAV weight greatly, because it is a source of variety structure loads. Weight reduction efficiency factor, verifying in terms of design quality a micro gas turbine, and the flying object as a system. Developed computational model allows to estimate weight of the components (gas generator shaft, compressor rotor, compressor diffuser, combustor, turbine nozzle, turbine rotor, jet pipe, casings and housings) and whole engine as well. Model inputs are related to technological axisymmetric dimensions obtained from thermo gas dynamic and construction equations, making it easy to use. Obtained results was presented for several micro gas turbines (mSO1-designed by author, FD3-64, TK-50, JF-50, MW-54, KJ-66, AMT Olympus). Advantage of this model allows to avoid time consuming CAD modelling process at design study level. Presented algorithm can be used also in the design of UAV as well as issues related to the preliminary multidisciplinary design and optimization PMDO cases.
Źródło:: Journal of KONES; 2013, 20, 1; 49-54
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Cooled turbine cantilevered nozzle mounting and sealing system
Autorzy:: Rzeszutek, Leszek
Kaczmarek, Grzegorz
Powiązania:: https://bibliotekanauki.pl/articles/245058.pdf
Data publikacji:: 2019
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
gas turbine
cooled turbine
cantilevered nozzle segment
sealing
Opis:: Small advanced turboprop and turboshaft engines, with two-stage high-pressure turbine (HPT), need to meet several challenges. Described herein is an exemplary solution adopted for a cantilevered HPT nozzle mounting and sealing system that helped to meet requirements for size constraint and sealing of split lines and mounting features. Since clearances do not scale down with engine size due to manufacturing tolerances, there is a very limited space available between first and second stage rotors to secure HPT nozzle and to provide means of cooling air supply. Due to small diameters, cavities and size of the parts and assembly access becomes very difficult and precluded the use of typical solutions – like supply air spooilers – known from bigger engines. Relatively larger clearances require also efficient solution for sealing leakage, which was achieved by means of high-temperature braided “rope seals”. The nozzle segments have weight effective hook-type outer band mounting to HPT outer casing and are axially retained by HPT shroud with a snap ring. The hook cavities were used as pockets for rope seals that are subsequently compressed during assembly making it more difficult. However, by special design of the pockets and parts engagement sequence, the assembly process was optimized even though it is so called blind assembly. The sealing system function is not only reducing leakages that are detrimental to a turbine efficiency, but also allow for pressurizing the cavity between the nozzle outer band and HPT outer casing with cooling air thus preventing from hot gas ingestion by higher back-flow margin (BFM) resulting in higher durability of the turbine.
Źródło:: Journal of KONES; 2019, 26, 3; 197-202
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: The influence of outlet system geometry on Tesla turbine working parameters
Autorzy:: Rusin, K.
Powiązania:: https://bibliotekanauki.pl/articles/105942.pdf
Data publikacji:: 2017
Wydawca:: Centrum Badań i Innowacji Pro-Akademia
Tematy:: Tesla turbine
CFD
bladeless turbine
turbina Tesli
bezłopatkowa turbina
Opis:: The paper presents an analysis of the influence of Tesla turbine outlet system geometry on parameter distribution and power. Simulations were carried out with the aid of Ansys products: DesignModeler, Meshing and CFX 17.0. The model geometry was based on the dimensions of existing turbine. Three different types of outlet system were investigated. A mesh independence study was carried out in order to obtain results which were unaffected by discretization method. Computations were performed using experimental data. The flow phenomena occurring inside the turbine are described in addition to the differences caused by outlet system geometry. Numerical results were confronted with experimental analysis.
Źródło:: Acta Innovations; 2017, 22; 58-67
2300-5599
Pojawia się w:: Acta Innovations
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Dimensioning of port waterways for vessels handling offshore wind farms using the navigational risk analysis
Autorzy:: Gucma, Stanisław
Gralak, Rafał
Powiązania:: https://bibliotekanauki.pl/articles/24202516.pdf
Data publikacji:: 2022
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: offshore wind farm
offshore wind turbine
offshore wind turbine installation terminal
wind turbine installation vessel
wind turbine transport vessel
dimensioning of waterways
Opis:: This article indicates the development trends in the construction of offshore wind turbines worldwide, and the characteristics of existing and planned ships for wind turbine installation and maintenance; it presents an approach to design ports with their future operations in mind. Problem: The safety of navigation in port waterways is the basic restrictions for the construction of harbors (terminals) to handle ships used for the construction of OWT and for increasing their size. Navigational risk is a criterion of navigational safety assessment that allows its accurate estimation in port waterways. Method: The article presents the method for dimensioning port waterways for ships serving offshore sea wind turbine transport and construction. Furthermore, a method for determining the navigational risk of jack-up vessels navigating in port waterway areas is presented. Results: The authors have determined conditions for safe operation of these ships in restricted areas and defined the basic condition of navigational safety. The presented method of navigational risk analysis refers to the departure of a loaded ship carrying offshore wind turbine components in the presently designed port terminal in Świnoujście for handling offshore wind farm projects. Conclusion: These are universal methods that can be applied to the design of ports serving vessels that install offshore wind turbines in various types of waters.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2022, 70 (142); 9--19
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Theoretical studies of variable geometry : hot section of the miniature jet engine
Autorzy:: Chmielewski, M.
Fulara, S.
Gieras, M.
Powiązania:: https://bibliotekanauki.pl/articles/243769.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: small gas turbine
variable geometry
combustor chamber
turbine nozzle
efficiency
Opis:: The aim of this article is to present the results of theoretical studies regarding the use of variable geometry hot section of a miniature gas turbine. The variable geometry combustor and variable area nozzle concepts for GTM-120 miniature jet engine are presented in particular. Recent trends of propulsion system size reduction, low-emission combustion and improved fuel efficiency have been considered. A system of variable geometry combustor and variable area nozzle has been proposed as solution. The basic zero-dimensional analytical models for variable geometry combustor and variable area nozzle are developed. Chemkin based model shows significant NOX/CO emissions reduction and combustor outlet enthalpy increases with the use of variable geometry combustor chamber. The analytical model of the variable area nozzle has been proposed. It shows turbine effectiveness increase across its operating range by raising the compressor working line. As a result, noticeable turbine stage efficiency increase has been obtained. Finally, physical implications and future work plans regarding variable geometry hot section of miniature gas turbines are discussed.
Źródło:: Journal of KONES; 2016, 23, 2; 69-80
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Study of characteristic curves of rotodynamic pumps working as turbines
Autorzy:: Złoty, Ł.
Pasikowski, D.
Powiązania:: https://bibliotekanauki.pl/articles/175346.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: pump as turbine (PAT)
rotodynamic pump
hydraulic power
recovery turbine
Opis:: Centrifugal pumps working in reverse mode can be a good alternative for conventional water turbines. Prediction of the pumps as turbine characteristic curve is still complicated due to the lack of information provided by the producers and rare research focusing on this subject. In some cases of pumping systems it is important to estimate the operating point in turbine mode basing on pump test data. In this paper the pump characteristics in turbine mode for ten pumps with a specific speed between 10-261 were compared and analyzed. The formulas used to predict the best performance point and characteristics of pump as turbine was reviewed. Own formulas for calculating optimum points of pump in the turbine mode was proposed.
Źródło:: Transactions of the Institute of Fluid-Flow Machinery; 2017, 136; 35-46
0079-3205
Pojawia się w:: Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: On the possible increasing of efficiency of ship power plant with the system combined of marine Diesel engine, gas turbine and steam turbine in case of main engine cooperation with the gas turbine fed in series and the steam turbine
Autorzy:: Dzida, M.
Girtler, J.
Dzida, S.
Powiązania:: https://bibliotekanauki.pl/articles/258820.pdf
Data publikacji:: 2009
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: ship power plants
combined systems
diesel engine
gas turbine
steam turbine
Opis:: The article presents a concept of a combined large power ship propulsion system consisting of the leading Diesel main engine, associated with a power gas turbine and the steam turbine system which utilise the energy contained in the exhaust gas leaving the Diesel engine. In the examined variant of the combined system the power turbine is fed in series with the exhaust gas. A calculation algorithm is given along with the results of calculations of particular subsystems of: the turbocharging system, the power gas turbine, and the steam turbine cycle. Assumptions and limits adopted in the calculations are presented. Selected system parameters were confronted with the results of experimental investigations available in the literature. The power optimisation of the entire combined ship power plant was only performed taking into account the thermodynamic point of view, leaving aside technical and economic aspects. Numerical calculations were performed for the 52 MW low-speed Diesel engine produced by Wärtsilä.
Źródło:: Polish Maritime Research; 2009, 3; 26-31
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Turbine propulsion education at Maritime University of Szczecin
Autorzy:: Behrendt, C.
Szczepanek, M.
Powiązania:: https://bibliotekanauki.pl/articles/359040.pdf
Data publikacji:: 2013
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: turbine
education
simulator
training
Opis:: The analysis of students’ education at the Engineering Department of the Maritime University of Szczecin has been presented in this paper with reference to steam and gas turbine propulsion used in marine industry. Changes in syllabuses have been taken into consideration due to the changes of studies organization at the University and requirements for marine crew education. Laboratory base used for practical training has been presented too.The analysis of students’ education at the Engineering Department of the Maritime University of Szczecin has been presented in this paper with reference to steam and gas turbine propulsion used in marine industry. Changes in syllabuses have been taken into consideration due to the changes of studies organization at the University and requirements for marine crew education. Laboratory base used for practical training has been presented too.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 33 (105); 5-10
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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