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Wyszukujesz frazę "end region" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
3D loss and heat analysis at the end region of 4-poles 1150 MW nuclear power turbine generator
Autorzy:
Zhou, G.
Han, L.
Fan, Z
Liao, Y.
Huang, S.
Powiązania:
https://bibliotekanauki.pl/articles/950663.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
loss and heat
end region
4-poles nuclear power turbine generator
electromagnetic field
temperature field
Opis:
To study the principle of loss and heat at the end region of large 4-poles nuclear power turbine generator, 3D transient electromagnetic field and 3D steady temperature field finite element (FE) models of the end region are established respectively. Considering the factors such as rotor motion, core non-linearity and time-varying of electromagnetic field, the anisotropic heat conductivity and different heat dissipation conditions of stator end region, a 50 Hz, 1150 MW, 4-poles nuclear power turbine generator is investigated. The loss and heat at the generator end region are calculated respectively at no-load and rated-load, and the calculation results are compared with the test data. The result shows that the calculation model is accurate and the generator design is suitable. The method is valuable for the research of loss and heat at the end region of large 4-poles nuclear power turbine generator and the improvement of the generator’s operation stability. The method has been applied successfully for the design of the larger nuclear power turbine generators.
Źródło:
Archives of Electrical Engineering; 2014, 63, 1; 47-61
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Visualization of auto-ignition of end gas region without knock in a spark-ignition natural gas engine
Autorzy:
Tomita, E.
Kawahara, N.
Zheng, J.
Powiązania:
https://bibliotekanauki.pl/articles/246275.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
knock
spark-ignition engine
homogeneous mixture
visualization
natural gas
End Gas Region
Opis:
It is important to increase thermal efficiency in a spark-ignition engine for reducing carbon dioxide gas in exhaust emissions. One of the solutions is to increase the compression ratio of the engine. Then, knock is a barrier in increasing in compression ratio because of higher pressure and unburned gas temperature in the end gas region. Therefore, there have been many studies on knock. However, there was an interesting phenomenon under some conditions in a gas engine. There is no pressure oscillation in the end stage of combustion and rate of heat release increased. It is considered that the auto-ignition in the end gas region occurs without knock. In this study, the combustion behavior in the end gas region was visualized with an ultra-high-speed camera. In normal combustion case, the flame propagates in the end gas region. In the knock case, the auto-ignited part burns suddenly and leads pressure oscillation. Under the critical conditions, some shows knock and some shows normal flame propagation. However, in some cases, even if auto-ignition occurs, pressure wave is not produced. Then there is no pressure oscillation, that is, mild auto-ignition without knock can be confirmed. And the rate of heat release shows two peaks. The first peak is due to flame propagation and the second peak is due to auto-ignition in the end gas region. The combustion near the end stage become short and thermal efficiency is expected to be increased because of increase in degree of constant-volume.
Źródło:
Journal of KONES; 2010, 17, 4; 521-527
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Emergence of Baltic Sea Region cooperation and the origin of the Baltic University Programme
Autorzy:
Rydén, Lars
Powiązania:
https://bibliotekanauki.pl/articles/1177300.pdf
Data publikacji:
2011-01-01
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Baltic Sea region
Baltic University Programme
university cooperation
international education
transition states
Cold War end
Źródło:
Folia Scandinavica Posnaniensia; 2011, 12; 259-276
1230-4786
2299-6885
Pojawia się w:
Folia Scandinavica Posnaniensia
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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