Tribology and Lubricants

  • 제23권2호
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  • Pages.43-48
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  • 2007
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  • 2713-8011(pISSN)
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  • 2713-802X(eISSN)
한국트라이볼로지학회 (Korean Tribology Society)
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누설량 저감을 위한 래버린스 실의 설계개선 및 해석

Leakage Analysis and Design Modification of the Combination-Type-Staggered-Labyrinth Seal

  • 하태웅 (경원대학교 기계.자동차공학부)
  • 발행 : 2007.04.30
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초록

Leakage reduction through annular type labyrinth seals of steam turbine is necessary for enhancing their efficiency. In this study, modified geometry of the original combination-type-staggered-labyrinth seal has been suggested and numerical analysis for leakage prediction has been carried out for the modified-combination-type-staggered-labyrinth seal both based on bulk-flow model and using the CFD code FLUENT. The theoretical analysis based on bulk-flow model yields leakage reduction of the modified combination type staggered labyrinth seal by about 11%. Comparing with the result of Bulk-flow model analysis, the leakage result of CFD analysis shows reasonable agreement within 9.8% error.

키워드

참고문헌

  1. 하태웅, 이용복, 김승종, 김창호, '스팀 터빈용 조합형 엇갈린 래버린스 실의 누설량 및 동특성 해석,' 유체기계저널, 제7권 제6호, pp. 45-54, 2004
  2. 하태웅, 'CFD를 사용한 복잡한 형상을 갖는 래버린스 실의 누설량 예측,' 윤활학회지, 제22권 제2호, pp. 66-72, 2006
  3. Alford, J. S., 'Protecting Turbomachinery from Self-Excited Rotor Whirl,' ASME Trans. Journal of Engineering for Power, October pp. 333-344, 1965
  4. Iwatsubo, T., 'Evaluation of Instability Forces of Labyrinth Seals in Turbines or Compressors,' NASA CP 2133 Proceedings ofa Workshop at Texas A&M University 12-14 May Entitled Rotordynamic Instability Problems in High Performance Turbomachinery, pp. 139-167, 1980
  5. Jenny, R. J., Wyssmann, H. P. and Pham, T. C., 'Prediction of Stiffiness and Damping Coefficients for Centrifugal Compressor Labyrinth Seals,' ASME 84-GT-86. Presented at the 29th International Gas Turbine Conference and Exhibit, Amsterdam, The Netherlands, June 4-7, 1984
  6. Childs, D. W. and Scharrer, J. K., 'An Iwatsubo Based Solution for Labyrinth Seals: A Comparison to Experimental Results,' ASME Trans. Journal of Engineering for Gas Turbines and Power, April Vol. 108, pp. 325-331, 1986 https://doi.org/10.1115/1.3239907
  7. Scharrer, J., 'A Comparison of Experimental and Theoretical Results for Labyrinth Gas Seals,' Ph. D. Dissertation, Texas A&M University, 1987
  8. 하태웅, 이안성, '압축기용 라비린스 실의 동특성 해석,' 한국소음진동공학회지, 제8권 제5호, pp. 849-855, 1998
  9. Scharrer, J. K., 'Rotordynamic Coefficients for Stepped Labyrinth Gas Seals,' ASME/ASLE Tribology Conference, Paper No. 88-Trib-42, 1988
  10. Ha, T. W., 'Rotordynarnic Analysis for Stepped-Labyrinth Gas Seal Using Moody's Friction-Factor Model,' KSME International Journal, Vol. 15, No.9, pp. 1079-1089, 2001 https://doi.org/10.1007/BF03185088
  11. 하태웅, '엇갈린 래버린스 실의 누설량 및 동특성 해석,' 윤활학회지, 제18권 제1호, pp. 24-33, 2002
  12. Neumann, K., 'Zur Frage der Verwendung von Durchblickdichtungen in Dampgturbinebau,' Maschinentechnik, Vol. 13, No.4, 1964
  13. Vermes, G., 'A Fluid Mechanics Approach to the Labyrinth Seal Leakage Problem,' ASME Journal of Engineering for Power, Vol. 83, No.2, April pp. 161-169, 1961 https://doi.org/10.1115/1.3673158
  14. Gurevich, M. I., 'The Theory of Jets In an Ideal Fluid,' Pergamon Press, London, England, pp. 319-323, 1966
  15. John, J. E. A., 'Gas Dynamics,' Wylie, 1979
  16. 하태웅, 'CFD를 사용한 터보기계 비접촉식 실의 누설량 예측,' 유체기계저널, 제9권 제3호, pp. 14-21, 2006 https://doi.org/10.5293/KFMA.2006.9.3.014
  17. Fluent User's Guide Ver. 6.2

피인용 문헌

  1. 회전체 동역학 및 트라이볼로지 요소의 연구동향 vol.11, pp.1, 2008, https://doi.org/10.5293/kfma.2008.11.1.100
  2. CFD를 사용한 스팀터빈용 각이 진 패킹 링 실의 누설량 예측 vol.25, pp.5, 2007, https://doi.org/10.9725/kstle.2009.25.5.298