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2003 Fiscal Year Final Research Report Summary

Study on Instabilities of Two-Phase He II/vapor flow in a pipe

Research Project

Project/Area Number 13555265
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Aerospace engineering
Research InstitutionTohoku University

Principal Investigator

KAMIJO Kenjiro  Tohoku University, Institute of Fluid Science, Professor, 流体科学研究所, 教授 (90282003)

Co-Investigator(Kenkyū-buntansha) MATSUMOTO Yoichiro  University of Tokyo, Department of Mechanical Engineering, Professor, 大学院・工学系研究科, 教授 (60111473)
TOKUMASU Takashi  Tohoku University, Institute of Fluid Science, Lector, 流体科学研究所, 講師 (10312662)
OIKE Mamoru  Ishinomaki Senshu University, School of Science and Engineering, Department of Mechanical Engineering, Professor, 理工学部・機械工学科, 教授 (70292282)
YAMADA Hitoshi  Japan Aerospace Exprolation Agency, Chief Researcher, 総合技術研究本部, 主任研究員
Project Period (FY) 2001 – 2003
Keywordscryogenic fluid / multiphase flow / flow instability / thermodynamic effect / cavitation model / drift-flux model / supersaturated state
Research Abstract

The aim of this research is to investigate the instability of supersaturated cryogenic two-phase flow experimentally and theoretically. This analysis is useful to the improvement of cryogenic apparatus such as turbopumps of rocket engine.
In this year numerical simulations are performed about the two-phase flow in the nozzle. The drift-flux model is used as the cavitation model and axisymmetric system is also used. The phase change is considered. As the results, the effect of phase change on flow field of cryogenic fluid appears the suppression of the increase of void fraction at the center of wake vortex generated downstream of nozzle throat. Moreover, it is confirmed that the counter flow generates at the wall of the nozzle as the wake vortex downstream of the nozzle throat grows up.
Next, experiments are performed about the visualization of two-phase flow of supersaturated cryogenic fluid. The data of both instability flow and stability one are obtained. As the results, the cavitating flow at saturated state is comparatively stable and the successive generation of bubble is observed. On the contrary, the cavitating flow at supersaturated state is very unstable and arbitrary generation of bubble is observed.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] Tokumasu, T., Matsumoto, Y., Kamijo, K., Oike, M.: "Molecular dynamics study of the nucleation of bubble"Proceedings of Fourth International Symposium on Cavitation. A1-005 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Oike, M., Tokumasu, T., Kamijo, K.: "Observation of Helium Two Phase Flows in a Pipe"Proceedings of Fourth International Symposium on Cavitation, Pasadena, CA, CAV2001. A8-002 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tokumasu, T., Kamijo, K., Sekino, Y., Matsumoto, Y.: "The Thermodynamic effects of Cavitation around a 2-D hydrofoil"Proceedings of the First International Symposium on Advanced Fluid Information, Sendai. 297-302 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Oike, M., Tokumasu, T., Kamijo, K.: "Observation of Two-Phase Cryogenic Flows in a Horizontal Pipe"Proceedings of the First International Symposium on Advanced Fluid Information, Sendai. 281-286 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ishimoto, J., Onishi, M., Tokumasu, T., Kamijo, K.: "Liquid nitrogen in horizontal rectangular nozzle"Proceedings of ASME International Mechanical Engineering Congress and Exposition. IMECE 2003-41250 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tokumasu, T., Matsumoto, Y., Kamijo, K., Oike, M: "Molecular dynamics study of the nucleation of bubble"Proceedings of Fourth International Symposium on Cavitation, Pasadena, CA, CAV2001 : sessionA1.005. (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Oike, M., Tokumasu, T., Kamijo, K.: "Observation of Helium Two-Phase Flows in a Pipe"Proceedings of Fourth International Symposium on Cavitation, Pasadena, CA, CAV2001 : sessionA8.002. (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tokumasu, T., Kamijo, K, Sekino, Y., Matsumoto, Y.: "The Thermodynamic effects of cavitation around a 2-D hydro foil"Proceedings of the First International Symposium on Advanced Fluid Information, Sendai. 297-302 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ishimoto, J., Onishi, M., Tokumasu, T., Kamijo, K.: "Liquid nitrogen in horizontal rectangular nozzle"Proceedings of ASME International Mechanical Engineering Congress and Exposition 2003 IMECE. 41250 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Oike, M., Tokumasu, T., Kamijo, K.: "Observation of Two-Phase Cryogenic Flows in a Horizontal Pipe"Proceedings of the First International Symposium on Advanced Fluid Information, Sendai. 281-286 (2001)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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