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4 de feb. de 2009 · The need to increase overall turbine efficiency is always a driving force for redesigning a turbine stage. In particular, the labyrinth leakage flows in the endwall regions contribute to an increase of the overall loss generation. In order to asses this mechanism, a detailed study of the effects of labyrinth seal geometry variation on the blade performance is presented. Two different shroud ...
turbine with staggered labyrinth seal cavity is shown in figure 3. Both of the computational domains of vane and rotor passage are meshed using O4H topology without tip clearances, ...
23 de abr. de 2021 · CONCLUSIONS. (1) We have optimized the basic parameters affecting the operation of the labyrinth seal. The values established are as follows: inclination of the crest’s lateral faces 2–10%, crest height 6%, channel length 5%, sharpness of crest 2.5% (or less), rounding at the base of the crest. Modeling permits 50% decrease in the losses ...
Labyrinth seals are extensively used in gas turbines to control leakage between static and rotating components. To control discharge coefficient, in actual gas turbine applications the labyrinth seal blade can also be designed to be inclined. In this research, the effects of seal geometry on the flow is considered.
1 de ene. de 2006 · So, a numerical calculation was conducted based on a high-pressure 1.5-stage steam turbine with the tip labyrinth seal. The leakage vortex system and the mixing ...
10 de nov. de 2016 · Labyrinth packing is sufficient to prevent steam leakage of steam or air in steam turbine .Low pressure steam is supplied to final seats of labyrinths.Labyrinth-type steam seal, also known as labyrinth steam seal, has the following commonly used structural forms: comb-shaped, D-shaped, and fir tree-shaped.
1 de dic. de 2020 · Abstract. Though simple and fast, bulk-flow models (BFMs) for gas labyrinth seals (LSs) often predict the mass flow inaccurately. The BFM models rely on classical Neumann's equation model to characterize the flow through a labyrinth tooth. Presently, a computational fluid dynamics (CFD) analysis quantifies the effects of tip clearance (Cr) and operating conditions on the prediction of LS mass ...
