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Wyszukujesz frazę "Szymaniak, M." wg kryterium: Autor


Wyświetlanie 1-6 z 6
Tytuł:
Steam turbine stage modernisation in front of the extraction point
Autorzy:
Szymaniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/260514.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
turbine stages
leakages
extraction point
axial flow turbines
Opis:
The paper presents modernisation of the steam turbine stage situated in front of the turbine extraction point, based on a 225 MW turbine LP stage as an example. The modernised design is intended to better control the steam flow in this area. In the presented design a special ring is used to drive the steam leakage flow directly to the heat exchanger. The performed experiments and numerical analyses confirmed measurable exploitation and efficiency advantages of the introduced modernisation. So far, it has been successfully applied in a number of turbines working in inland power plants, but its use can be easily extended, without need for further modification and without advantage loss, to marine turbines, especially those used as main propulsion in sea-going vessels.
Źródło:
Polish Maritime Research; 2018, 2; 116-122
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New approach to calculations of turbine stages and regeneration extraction points
Autorzy:
Szymaniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/1943248.pdf
Data publikacji:
2008
Wydawca:
Politechnika Gdańska
Tematy:
extension point
regenerative chambers
turbine stages
leakages
Opis:
The article presents 200MW LP turbine stage calculations taking into account leakage flows over rotor blades in the regeneration extraction point area. A methodology is described which allows the user to shorten the time-consuming CFD calculations solving the Navier-Stokes equation system in the examined area. A two-stage procedure was applied in which two types of calculations were coupled together. The first type is a one-to-one passage calculation of a steam flow through the turbine stages in the vicinity of the extraction point. This type of calculations preserves the circumferential periodicity condition. The second type is a circumferentially non-symmetrical calculation of the flow through an inter-stage diffuser with an extraction chamber. The calculations were preformed using 3D CFD codes, FlowER and FLUENT, in the two above mentioned areas, respectively. The solution was found using an iterative procedure for these areas coupled by boundary conditions, until convergence of calculations was reached.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2008, 12, 3-4; 209-215
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modernisation of steam turbine construction at regenerative steam extraction point
Autorzy:
Szymaniak, M.
Gardzilewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/1955313.pdf
Data publikacji:
2010
Wydawca:
Politechnika Gdańska
Tematy:
modernization
turbine stage
extraction point
leakage
Opis:
The paper presents a methodology which has led to improvement of the turbine stage performance in the regenerative steam extraction chamber area by introducing a ring which collects the leakage flow from the gaps over unshrouded rotor blade tips and directs it to the extraction chamber. A comparison is made between the results obtained for the initial design (without a ring) and the design with the ring mounted. The results obtained for the construction were calibrated using the data measured on a real turbine in a Polish power plant.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2010, 14, 4; 319-327
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unsteady flow through the gap of savonius turbine rotor
Autorzy:
Świrydczuk, J.
Doerffer, P.
Szymaniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/1934037.pdf
Data publikacji:
2011
Wydawca:
Politechnika Gdańska
Tematy:
Savonius turbine
rotor gap
vortices
Opis:
The paper presents a numerical analysis of unsteady flow through the gap of a Savonius turbine rotor, performed for varying integral turbine operating parameters calculated for the case under study as well as obtained from experiments described in the literature. Changes in the unsteady flow pattern, including the development and interaction of numerous vortex structures in the vicinity of the gap, and their relevance to the varying integral parameters are discussed. We conclude that the structure responsible for the intensity of the flow through the gap is a vortex which forms in the vicinity of the gap at certain phases of rotor revolution, and that a possible way to improve the efficiency of operation of a Savonius turbine is to control the intensity of this vortex by modifying the shape of the blade edges in the vicinity of the gap.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2011, 15, 1; 59-70
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polish aspects in the modern design solutions of steam turbine flow systems
Autorzy:
Gardzilewicz, A.
Obrzut, D.
Szymaniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/259290.pdf
Data publikacji:
2009
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
steam turbine
power cycles
flow systems
efficiency
errosion
Opis:
This paper presents new solutions of turbine stages which have been applied to high-power steam turbine flow systems. The structures, elaborated in Poland, were designed with the use of the authors’ original computational software and verified by measurements performed on real turbine sets.
Źródło:
Polish Maritime Research; 2009, S 1; 14-21
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis of energy and emission indicators of a piston engine supplied by a mixture of biogas
Autorzy:
Stępniak, D.
Surwiło, J.
Lampart, P.
Szymaniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/175362.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
piston combustion engine
low caloric fuels
biogas
CO
CO₂
NOx emission
Opis:
The paper presents the methodology and results of research focused on experimental investigation of combustion of biogas fuels in a combustion piston engine. The study highlights the variability of exhaust gases parameters produced by the engine running in an idle mode and in a generation mode. The experimental analysis includes research about variability of temperature in the cylinders, depending on the composition of fuel used to supply the engine. The qualitative and quantitative analysis of exhaust gases extends on biogas substitutes with different proportions of CH₄ and CO₂. Characteristics of a piston combustion engine were created, including CO, CO₂, NOx emission indicators, for a range of engine load and fuel composition.
Źródło:
Transactions of the Institute of Fluid-Flow Machinery; 2016, 134; 109-120
0079-3205
Pojawia się w:
Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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