A Simulation Study of Radial Slits Pressure Regulator for Hydrogen Gas

  • Takahiro Mizuno
  • Chongho Youn
  • Yoshinari Nakamura
  • Toshiharu Kagawa
Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 402)


Noise generation during decompressing hydrogen in fuel cell vehicles is an issue requiring technological solution. This paper studies noise reducing effect and the flow characteristic of radial slits installed in a pressure reducing valve. Simulation is carried out to estimate the pressure–flow characteristic of the radial slit as a noise reducing mean. The simulation indicates a decrease of Reynolds number in the downstream-side of the radial slits structure, which causes noise reduction. Moreover, we proposed installing radial slits to the downstream of a conventional valve. Noise reduction by this new design was verified with a series of experiments. As a result, the valve with radial slits has a noise reduction effect of about 12.1 dB (A) compared with the conventional valve.


Radial Slits Hydrogen Gas Pressure Regulator CFD 


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  1. 1.
    NEDO: Infrastructure technology development, such as safe use of hydrogen (2003) (in Japanese),
  2. 2.
    Ministry of Economy Trade and Industry: Joint Announcement by 13 Japanese companies (2011) (in Japanese),
  3. 3.
    Lighthill, M.J.: On Sound Generated Aerodynamically - I. General Theory. Proceedings of the Royal Society of London (Series A) 211(1107), 564–587 (1952)Google Scholar
  4. 4.
    Nishimura, N.: Aerodynamic Noise Reducing Technique by Flow Control. The Japan Society of Fluid Mechanics 20, 221–230 (2001) (in Japanese)Google Scholar
  5. 5.
    Sugiyama, K., Doi, S., Ogasawara, T.: Air Flow Noise Generated by a Nozzle with a Sudden Enlargement in Cross-Section. Transactions of the Japan Society of Mechanical Engineers (Series B) 49(443), 1420–1426 (1983)CrossRefGoogle Scholar
  6. 6.
    Nakano, M., Ota, E., Tajima, K.: Aerodynamic Study on Structure of Generating Noise and Vibration in High Pressure Gas Valves - I. The Japan Society of Mechanical Engineers (Series B) 45(391), 350–360 (1979) (in Japanese)CrossRefGoogle Scholar
  7. 7.
    Nakano, M., Tajima, K., Kumaido, K.: A Study on the Improvement of Noise Suppression in a Low-noise Valve of the Multiple Type- I. Transactions of the Japan Society of Mechanical Engineers (Series B) 54(500), 907–991 (1988)CrossRefGoogle Scholar
  8. 8.
    Nishimura, M., Kudo, T., Nishioka, M.: Aerodynamic noise reducing techniques by using pile fabrics. Fluid Dynamics Research 42 (2010)Google Scholar
  9. 9.
    Nishimura, M., Fukatsu, S.: Development of low-noise valve use porous metal. Transactions of the Japan Society of Mechanical Engineers (Series A) 920(78), 431–433 (1992)Google Scholar
  10. 10.
    Kagawa, T., Sekita, K., Murayama, K., Naitou, K.: Control valve, 10-169792Google Scholar
  11. 11.
    Youn, C., Muramatsu, H., Kawashima, K.: Research by visualization of Low Noise Pressure Reducing Structure using Slit Flow. The Japan Fluid Power System Society 36(3), 59–65 (2005) (in Japanese)CrossRefGoogle Scholar
  12. 12.
    Youn, C.: Research on the pneumatic system pressure reduction by a slit-type structure,a doctor thesis. Tokyo Institute of Technology (2004) (in Japanese)Google Scholar
  13. 13.
    Hydrogen Energy Test and Research Center (HyTReC) (in Japan),

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Takahiro Mizuno
    • 1
  • Chongho Youn
    • 1
  • Yoshinari Nakamura
    • 2
  • Toshiharu Kagawa
    • 1
  1. 1.Precision and Intelligence LaboratoryTokyo Institute of TechnologyYokohama-shiJapan
  2. 2.Mechanical Component Engineering Sect.KYB CorporationSagamihara-shiJapan

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