Abstrakt
Paper presents the results of experimental and numerical research of a
model segment of a labyrinth seal for a different wear level. The analysis
covers the extent of leakage and distribution of static pressure in the
seal chambers and the planes upstream and downstream of the segment. The
measurement data have been compared with the results of numerical
calculations obtained using commercial software. Based on the flow
conditions occurring in the area subjected to calculations, the size of
the mesh defined by parameter y+has been analyzed and the selection of the
turbulence model has been described. The numerical calculations were based
on the measurable thermodynamic parameters in the seal segments of steam
turbines. The work contains a comparison of the mass flow and distribution
of static pressure in the seal chambers obtained during the measurement
and calculated numerically in a model segment of the seal of different
level of wear.
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