Numerical calculation ofleakage flow rate and pressure distribution 23 4 pressure dependent discharge flow coefficient. A theoretical model for the design of a labyrinth seal gland. Preliminary calculation of the seal cavity averaged pressure by using the onedimensional control volume method showed favorable agreement with the experimental measurements. Abstract labyrinth seals are a noncontacting sealing device consists of a series of cavities connected by small clearances. Seals are basic mechanical devices used in machinery to avoid undesired flow losses of working fluids. In 2011, with a non rotating shaft, seal flow rate measurements with increasing inlet air temperatures to 300c show the halotm seal leaks 50% or less than the labyrinth seal. A seal is a component used in a turbomachine to reduce internal leakage of the working fluid and to increase the machines efficiency. Particularly annular seals are one of the most widely used in.
Numerical analysis of leakage flow through two labyrinth seals. Cavity pressures, velocity and leakage computation in. He was able to show how much the flow pattern in the labyrinth seal is affected by the ratio of the axial leakage velocity to the shaft peripheral speed. Preliminary calculation of the sealcavity averaged pressure by using. Although the methods available for estimating labyrinth seal leakage and calculating the pressures are numerous, each is based on certain simplifying assumptions which.
The computational program is refered to as leak in this thesis. Discharge flow coefficient for straight labyrinth seal teeth on the. Leakage and cavity shape studies of labyrinth seals. They are used in many places in gas turbine engine to optimize and improve their design using cfd, is of interest to this study with newer designs of labyrinth seal. Proceedings of asme turbo expo 2002 june 36, 2002, amsterdam, the netherlands gt200230348 simulation of the interaction of labyrinth seal leakage flow and. Numerical analysis of leakage flow through two labyrinth.
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