Numerical Simulation of Flow Fields in Diaphragm Gland of Steam Turbine

The leakage characteristics of the bending-teeth gland, which may be helpful for the fast start and fast stop of the steam turbine, was discussed in this paper by using ANSYS6.1 software. By compared the flow fields in straight-teeth gland and bending-teeth gland, the methods for the bending-teeth gland to decrease the steam leakage was proposed. The results show that, although the leakage of the bending-teeth gland is larger than that of the straight-teeth gland at the same number of teeth and other conditions, this will be changed if the number of the teeth increases or the leaking gap decreases for the bending-teeth gland.

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