Stability of Rotor-Bearing-Seal Systems

In various industrial applications, there is a need
for higher speed, yet reliably operating rotating
machinery. A key factor in achieving this type of
machinery continues to be the ability to accurately
predict the dynamic response and stability of a
rotor-bearing-seal system. In operation, the rotor
undergoes bending and torsional vibration. The
vibration of a rotor depends upon its geometry and
type of support, as well as on the excitation forces.
One of the most important sources for excitation is
the flow through labyrinth seals. The gas flow
through the seals, primarily intended for leakage
control in turbines, creates net pressure and shear
forces acting on the rotor. It is necessary to
predict these forces exactly for reliably operating
turbomachines. This book, therefore, provides
theoretical investigation of the gas flow in
straight-through labyrinth seals and its effect on
the stability of the rotor. In addition, stability of
rotor-bearing systems is given to introduce and
explain the nature of rotordynamic phenomena from
comparatively simple analytical models. This book
will no doubt be of value to graduate students and
researchers in engineering and applied sciences.

Autorentext

Ugur Yücel, Ph.D.: Studied Applied Mathematics at Lehigh
University, Bethlehem, PA, USA. Currently working as an associate
professor at the Department of Mathematics at Pamukkale
University, Denizli, Turkey. Research interests include air flow
in labyrinth seals and numerical solutions of ordinary and
partial differential equations.

Klappentext

In various industrial applications, there is a need
for higher speed, yet reliably operating rotating
machinery. A key factor in achieving this type of
machinery continues to be the ability to accurately
predict the dynamic response and stability of a
rotor-bearing-seal system. In operation, the rotor
undergoes bending and torsional vibration. The
vibration of a rotor depends upon its geometry and
type of support, as well as on the excitation forces.
One of the most important sources for excitation is
the flow through labyrinth seals. The gas flow
through the seals, primarily intended for leakage
control in turbines, creates net pressure and shear
forces acting on the rotor. It is necessary to
predict these forces exactly for reliably operating
turbomachines. This book, therefore, provides
theoretical investigation of the gas flow in
straight-through labyrinth seals and its effect on
the stability of the rotor. In addition, stability of
rotor-bearing systems is given to introduce and
explain the nature of rotordynamic phenomena from
comparatively simple analytical models. This book
will no doubt be of value to graduate students and
researchers in engineering and applied sciences.