Temat: excited vibrations - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Remarks on aerodynamic forces in seals of turbine stages
Autorzy:: Stępień, R.
Kosowski, K.
Powiązania:: https://bibliotekanauki.pl/articles/259359.pdf
Data publikacji:: 2009
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: rotor dynamics
self-excited vibrations
aerodynamic forces
blade seals
turbine shrouds
Opis:: This paper presents results of numerical examination of flow through over-shroud seals of turbine stages. Various labyrinth seals of different configurations and number of sealing teeth were considered. It was demonstrated that results of investigations of isolated seals cannot be directly used for analyzing turbine stage operation. Such approach may lead to relatively large errors in determining value of aerodynamic force and direction of its action.
Źródło:: Polish Maritime Research; 2009, S 1; 58-63
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: On the modelling of aerodynamic force coefficients for over-shroud seals of turbine stages
Autorzy:: Włodarski, W.
Kosowski, K.
Powiązania:: https://bibliotekanauki.pl/articles/259389.pdf
Data publikacji:: 2009
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: rotor dynamics
self-excited vibrations
aerodynamic forces
blade seals
turbine shrouds
Opis:: This paper presents experimental investigations which made it possible to determine dynamic coefficients of labyrinth over-shroud seal of a model air turbine. The coefficients associate pressure forces with turbine rotor displacement, velocity and acceleration respective to turbine casing (linear model) and play important role in analyzing turbine-set dynamics. The obtained results indicated that involving serious errors can be expected in the case of application of the simplification consisting in neglecting inertia coefficients, proposed in the literature. It was simultaneously demonstrated that seals can be also met of weak damping qualities, for which to neglect damping coeffcients is allowable.
Źródło:: Polish Maritime Research; 2009, S 1; 71-74
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

Artykuł

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