<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>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.</p><p>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.</p></abstract>

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.

On the modelling of aerodynamic force coefficients for over-shroud seals of turbine stages

Polish Maritime Research

This paper presents experimental investigations which made it possible to determine dynamic coefficients of labyrinth over-shroud seal of a model air turbine....

On the modelling of aerodynamic force coefficients for over-shroud seals of turbine stages

Publié en ligne: 16 juin 2010

Pages: 71 - 74

DOI: https://doi.org/10.2478/v10012-008-0048-y

Mots clés
rotor dynamics, self-excited vibrations, aerodynamic forces, blade seals, turbine shrouds

This content is open access.

On the modelling of aerodynamic force coefficients for over-shroud seals of turbine stages

Publié en ligne: 16 juin 2010

Pages: 71 - 74

DOI: https://doi.org/10.2478/v10012-008-0048-y

Mots clésrotor dynamics, self-excited vibrations, aerodynamic forces, blade seals, turbine shrouds

This content is open access.

Mots clés
rotor dynamics, self-excited vibrations, aerodynamic forces, blade seals, turbine shrouds