Internal Flow of Rotating Labyrinth Seal with Low Static Pressure Difference and Large Clearance(ABSTRACTS OF PROCEEDINGS OF THE SCHOOL OF ENGINEERING SERIES J TOKAI UNIVERSITY -2003-2004-)

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Description

In this paper, we discuss a straight-through-type labyrinth seal. This labyrinth seal is used for axial flow fans that have an outer ring at the blade tip to seal the clearance between the ring tip and the fan shroud, in order to prevent reverse flow or leakage. These fans are used for cooling of automobile radiators. In these cases, the labyrinth seal is used under an extremely low static pressure difference and a large clearance. A significant decrease in leakage rate was reported even when the labyrinth seal rotated at a comparatively low speed under this unique condition in our former study. However, this phenomenon is different from that observed in past research. Furthermore, the cause of this phenomenon has not been determined. Therefore, the internal flow was depicted using Computational Fluid Dynamics (CFD) in order to determine the cause of this phenomenon. The results of CFD show that leakage rate decreases significantly because the carry-over flow is intercepted in the expansion groove. This is a newly discovered phenomenon that occurs under the unique condition of an extremely low differential pressure. This has not been pointed out before as an explanation for the decrease in leakage rate with rotation.

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Details 詳細情報について

  • CRID
    1570572702049540224
  • NII Article ID
    110004302445
  • NII Book ID
    AA11898836
  • ISSN
    13494651
  • Text Lang
    en
  • Data Source
    • CiNii Articles

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