Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Leakage and Rotordynamic Analysis for Staggered-Labyrinth Gas Seal

엇갈린 래버린스 실의 누설량 및 동특성 해석

  • Ha, Tae-Woong (Kyungwon University, Dept. of Mechanical Engineering)
  • 하태웅 (경원대학교 건축설비 기계공학부)
  • Published : 2002.02.28
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Abstract

The basic equations are derived for the analysis of a staggered labyrinth gas seal which are generally used in high performance compressors and steam turbines. The Bulk-flow is assumed for a single cavity control volume and the flow is assumed to be completely turbulent in circumferential direction. Moody's wall-friction-factor formula is used for the calculation of wall shear stresses in the single cavity control volume. For the reaction force developed by the seal, linearized zeroth-order and first-order perturbation equations are developed for small motion about a centered position. Integration of the resultant first-order pressure distribution along and around the seal defines the rotordynamic coefficients of the staggered labyrinth gas seal. Theoretical results of leakage and rotordynamic characteristics for the staggered labyrinth gas seal are compared with those of the plain seal and see-through labyrinth seal.

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References

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