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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 ...
12 de abr. de 2022 · The leakage fraction. of sta ggered labyrinth seal cavity is 0.35% lower than that of conventional labyrinth seal structure, with the 0.52%. improvement of isentropic efficiency. The comparison of ...
Turbine Shaft Seals: Challenges and Goals. Challenges: Minimize leakage to reduce fuel consumption and emissions. High temperatures up to 1500°F. High speeds up to 1500 ft/s. Moderate pressure 250 psid. Operate with little or no wear for long life 3-10,000 hrs. Minimize heat generation. GRC Non-Contacting Seal Project Goal:
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25 de sept. de 2019 · Abstract. The effect of the tip-shroud seal on the flutter onset of a shrouded turbine rotor blade, representative of a modern gas turbine, is numerically tested, and the contributions to the work per cycle of the aerofoil and the tip shroud are clearly identified. The numerical simulations are conducted using a linearized frequency-domain solver. The flutter stability of the shrouded rotor ...
To minimize steam leakage from the turbine gland, spring-backed labyrinth packings are used at both ends of the rotor. The labyrinth packings are divided into several segments to facilitate maintenance. The automatic steam regulator is provided to maintain the seal pressure constant at any turbine load.
1973-01-01. An abradable buffered labyrinth seal for the control of turbine gas path leakage in a tip-turbine driven lift fan was designed, tested, and analyzed. The seal configuration was not designed to operate in any specific location but was sized to be evaluated in an existing test rig.
