The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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Comparison of Theoretical Analysis with Test Results of Floating Ring Seals for the LRE Turbo Pump

액체 추진 로켓 터보 펌프용 플로팅 링 실에 대한 해석 및 실험 결과의 비교 연구

  • 이용복 (한국과학기술연구원 트라이볼로지연구센터) ;
  • 안경민 (한국과학기술연구원 트라이볼로지연구센터) ;
  • 김창호 (한국과학기술연구원 트라이볼로지연구센터) ;
  • 하태웅 (경원대학교 건축설비)
  • Published : 2004.12.01
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Abstract

The floating ring seal has an advantage to find the optimum position by itself, which is used in the turbo pump of a liquid rocket. The main purpose of seals is to reduce the leakage. Especially, seals of the turbo pump for the liquid rocket engine are operated under the serious conditions such as high pressure above 10 MPa, very low temperature about $-180^{\circ}C$ and high rotating speed above 25,000 rpm. So, rotordynamic stability is very important for the system stability. In this paper, the leakage and dynamic characteristics of floating ring seals were investigated by a experimental and analytical method. The theoretical results of the leakage performance for the floating ring seal showed much higher than that of experimental results. On the other hand, the results of stiffness and damping characteristics showed similarity each other. As the shaft speed was increasing, the whirl frequency ratio was increased in the experimental results.

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References

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