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Wyświetlanie 1-3 z 3
Tytuł:
CFD modelling of turbine stage stator/rotor interaction
Autorzy:
Świdyrczuk, J.
Powiązania:
https://bibliotekanauki.pl/articles/1955217.pdf
Data publikacji:
2006
Wydawca:
Politechnika Gdańska
Tematy:
stator wakes
grid resolution
vortices
Opis:
Issues related to numerical analyses of turbine stage stator/rotor interactions are disceussed, with special focus on the selection of grid parameters to secure proper modelling of the stator wake's dissipation. Unsteady calculations of the flow through a high-pressure turbine stage, based on 3D ORANS equations, are employed in the grid resolution analysis. Their results are compared with those obtained with other methods, both developed by the author or available in the literature. As a result, the 3D grid resolution of the order of 2000000 cells per one stator and/or one rotor passage has been determined as the necessary minimum for properly modelling the dissipation of the stator's wake on its war through the rotor's cascade, under the circumstances determined by the used CFD code. A generalization of this result is proposed.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2006, 10, 2; 113-124
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unsteady flow simulation in hydraulic machinery
Autorzy:
Ruprecht, A.
Powiązania:
https://bibliotekanauki.pl/articles/1986686.pdf
Data publikacji:
2002
Wydawca:
Politechnika Gdańska
Tematy:
unsteady RANS
parallel computing
hydro turbine
rotor-stator interaction
vortex rope
Opis:
In the field of hydraulic machinery Computational Fluid Dynamics (CFD) is routinely used today in research and development as well as in the daily design phase. Today in industry mostly steady state simulations are applied. In this paper, however, an overview of unsteady simulations is shown for different applications. The presented examples contain problems with self excited unsteadiness, vortex rope in the draft tube, as well as applications with externally forced unsteadiness by changing or moving geometries and rotor-stator interactions. For the shown applications the requirements, potential and limitations of unsteady flow analysis are assessed.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2002, 6, 1; 187-208
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
3D inviscid flutter of rotor blades and stator/rotor stage
Autorzy:
Rządkowski, R.
Gnesin, V.
Powiązania:
https://bibliotekanauki.pl/articles/1967639.pdf
Data publikacji:
2001
Wydawca:
Politechnika Gdańska
Tematy:
3D inviscid flutter
flutter
blades
stator/rotor stage
rotor blades
unsteady forces
3D finite element model
Opis:
The approach is based on solution of the coupled aerodynamic-structure problem for 3D flow through the turbine stage in which fluid and dynamic equations are integrated simultaneously in time. An ideal gas flow through the mutually moving stator and rotor blades with periodicity on the whole annulus is described by unsteady Euler conservation equations, which are integrated using the explicit monotonous finite-volume difference scheme of Godunov-Kolgan and moving hybrid H-H grid. The structure analysis uses the modal approach and 3D finite element model of a blade. A calculation was performed for the last stage of the steam turbine with rotor blades of 0.765 m.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2001, 5, 4; 567-577
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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