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2002 Fiscal Year Final Research Report Summary

Pressure Pulsation Caused by the Interaction between the Perforated Plate Installed in a Pipe and the Fluid

Research Project

Project/Area Number 13650197
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionShizuoka Institute of Science and Technology

Principal Investigator

SANO Masashi  Shizuoka Institute of Science and Technology, Faculity of Science and Technolory, Professor, 理工学部, 教授 (80226042)

Project Period (FY) 2001 – 2002
KeywordsFlow-Induced Vibration / Self-Excited Vibration / Lock-in / Natural Frequency / Perforated Plate / Lateral Vibration / Vortex Shedding / Interaction
Research Abstract

The pressure fluctuations accompanying the occurrence of lock-in caused by the vortex shedding from the perforated plate were examined experimentally. The results are summarized as follows:
(1) When the lock-in occurs, the in-phase lateral vibration, (0,0) mode, of the perforated plate is generated. The plate displacement has a slight phase lag with respect to the differential pressure across the plate
(2) The amplitudes and phases of pressure fluctuation along the pipe agree well with that calculated using continuity. Equation at the plate location under the non-cavitationg condition
(3) During the cavitation occurrence the amplitudes and phases of pressure fluctuation deviate from the values for the non-cavitation, while the lock-in frequencies decrease gradually with increasing velocity
(4) Natural frequency, 3750Hz, for (0,0) mode lateral vibration of the perforated plate is larger than the lock-in frequencies in this study
(5) The lock-in phenomena is caused by the lateral vibration of the perforated plate due to the differential pressure fluctuation across the plate when the vortex-shedding frequencies agree with the natural frequencies of the liquid column, or the pressure loop is located at the just before or after the plate

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 佐野勝志: "管内多孔板からの渦放出に伴う圧力脈動 (キャビテーション発生時の挙動)"日本機械学会2001年度年次大会講演論文集Vol V. No.01-1. 143-144 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 佐野勝志: "管内多孔板からの渦放出に伴う圧力脈動 (ロックイン発生時の管内変動圧力モード)"日本機械学会論文集(C編). 68巻670号. 1701-1707 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] SANO, M.: "Pressure Pulsation Caused by Vortex Shedding from a Perforated Plate with Holes (Behavior during the Occurrence of Cavitation)"Preprint of 2001 JSME Annual Meeting (in Japanese). V, No.01-1. 43-144 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] SANO, M.: "Pressure Pulsation Caused by Vortex Shedding from a Perforated Plate with Holes (Pressure Modes in a Pipe during the Occurrence of Lock-in)"Trans. Jpn. Soc. Mech. Eng. (in Japanese), Ser. B. 68, No.670. 1701-1707 (2002)

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

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Published: 2004-04-14  

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