EPJ Web of Conferences (Jan 2017)

Correction coefficient for see-through labyrinth seal

  • Hasnedl Dan,
  • Epikaridis Premysl,
  • Slama Vaclav

DOI
https://doi.org/10.1051/epjconf/201714302034
Journal volume & issue
Vol. 143
p. 02034

Abstract

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In a steam turbine design, the flow-part design and blade shapes are influenced by the design mass-flow through each turbine stage. If it would be possible to predict this mass-flow more precisely, it will result in optimized design and therefore an efficiency benefit. This article is concerned with improving the prediction of losses caused by the seal leakage. In the common simulation of the thermodynamic cycle of a steam turbine, analytical formulas are used in order to simulate the seal leakage. Therefore, this article describes an improvement of analytical formulas used in a turbine heat balance calculation. The results are verified by numerical simulations and experimental data from the steam test rig.