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Abstract: The
property of labyrinth seal relies on the throttling process in clearance
and the dynamic dissipating process in cavity, these two procedures play
decisive roles in essential to the sealing property of the labyrinth.
Study on the flow field in labyrinth seal is helpful for us to make use
of some characters of turbulence in improving the sealing
property. Model experiment and numerical simulation are adopted to study
the seal mechanism of a crenellated radial labyrinth. It is shown that
flow deflection in throttle clearance can effectively decrease the
actual flow area in the clearance and improve the seal property. Thus
the flow deflection in throttle clearance can be utilized to replace the
small clearance, and a better seal property can be achieved under
condition of wide clearance. This is of great importance to the design,
production and operation of labyrinth, and lays a foundation for the
invention of newly constructed labyrinth seal.
Key words: Labyrinth
seal Flowfield simulation Flow deflection Seal mechanism
Resistance enhancement by turbulence
CLC No: TB42
中国石油天然气总公司石油科技中青年创新基金项目.
Received 20030526, received in revised form 20030915
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